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1、人教版小学一年级数学下册重点、难点复习一、位置1.、位置的表示：上边、下边、左边、右边、前边、后边。上面、下面、左面、右面、前面、后面。2、在填写含有序数的位置关系时，先看给出的物体位置是怎么数的，那么其他的物体的位置也按相同的顺序数。见课本第5 页位置。二、20 以内的退位减法1、方法：相加算减分解法过程：如：129=3 12 9=3 把12 分解成 10 和 2 过程：想 9+3=12 先算：10-9=1 则 12-9=3 10 2 再算：1+2=3 1 2、应用题：已知条件里知道了其中一部分和另一部分，求总数，用加法计算。问题里常见的关键字：一共、共、总的、原有等。已知条件里知道了总数和
2、其中一部分，求另一部分，用减法计算。问题里常见的关键字：还剩、还有、应找回等。精品资料-欢迎下载-欢迎下载 名师归纳-第 1 页，共 30 页 -三、图形的拼组1、平面图形的拼组 区分正方形和长方形长方形的特点：相对的两条长边相等，相对的两条短边相等。正方形的特点：四条边长度都相等。正方形（四条对称轴）长方形（两条对称轴）（2）常见拼组：两个完全相同的长方形可拼成正方形和长方形。两个完全相同的正方形可以拼成长方形。四个完全相同的小正方形，可拼成正方形和长方形。2、立体图形的拼组（！）区分正方体和长方体长方体：有 6 个面，相对的面相同。正方体：有 6 个面，每个面都相同，都是正方形。（2）常见
3、拼组 两个完全一样的长方体，可以拼成长方体。八个完全一样的正方体可以拼成一个大的正方体。当有好多个正方体重叠在一起的时候，不要忘数最底层或者最后面被遮掉的小正方体。精品资料-欢迎下载-欢迎下载 名师归纳-第 2 页，共 30 页 -文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A
4、3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E
5、2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R
6、6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10
7、I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4
8、F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码
9、:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A10L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3文档编码:CI1A1
10、0L7A2A3 HL3E2J5D2R6 ZU10I6V6A4F3四、100 以内数的认识1、10 个十是 100，读作一百。100 是由 10 个十或 100 个一组成，它是一个三位数。2、数数时，可以一个一个的数，也可以二个二个的数，五个五个的数，十个十个的数。3、从右边起，第一位是个位，第二位是十位，第三位是百位。百十个（右边）第三位第二位第一位4、读数和写数，都从高位起。当计数器上个位或十位一颗珠子都没有时，就写 0 占位。5、用计数器表示一个数时，计数器各数位上的珠子数和这个数的个位，十位，百位上的数字相对应。6、只有个位的数是一位数，如5、7、2；最大的一位数是 9。有个位、十位的数
11、是两位数，如32、20；最小的两位数是10，最大的两位数是 99。有个位、十位、百位的数是三位数，如100。100 是最小的三位数。7、一个数，个位上是几，表示有几个一；十位上是几，表示有几个十。反之，这个数有几个一，个位上就是几；有几个十，十位上就是几。8、数的顺序百数图1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 精品资料-欢迎下载-欢迎下载 名师归纳-第 3 页，共 30 页 -文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6
12、P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q
13、4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1
14、Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2
15、I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ
16、6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2
17、Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1
18、I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8举例：以 33 34 35为例：和 34相邻的两个数是 33和35；33 和 35 中间的数是 34。比 34 少 1 的数是 33，比 34 多 1 的数是 35。34 前面的数是 33，后面的数是 35；35 比 34 多 1，33 比 34 少 1。以 52 为例：52 和 60 之间的数是：53、54、55、56、57、58、59；（即大于 52 小于 60 的所有数）52 前面的五个数是：51、50、49、
19、48、47；后面的五个数是：53、54、55、56、57。52 前面的第五个数是：47；后面的第五个数是：57。9、两位数比较大小，先看十位，十位上大的数就大，当十位相同时，就比个位，个位大的数就大。10、多得多、少得多、多一些、少一些的用法。两个数相差很大时就用多得多，少得多。相差很小时就用多一些，少一些。例如：37 6 34 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 53 55 56 57 58 59 60 61 62 63 64 65
20、 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 精品资料-欢迎下载-欢迎下载 名师归纳-第 4 页，共 30 页 -文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I
21、6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6
22、Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y
23、1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I
24、2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:C
25、J6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD
26、2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV
27、1I2I6P4R8相比较后，37 和 6 相差很大，就说37 比 6 多得多或 6 比 37 少得多。37和 34 相差很小，就说 37 比 34 多一些或 34 比 37 少一些。11、整十数加一位数及相应的减法如：30+2=32（想：3 个十和 2 个一组成的数是32。）32 2=30（想：32 里去掉 2 个一，剩下 3 个十）口算方法：个位相加，十位不变；个位相减，十位不变。五、认识人民币1、1 元=10角（1 元钱可以换 10 个 1 角）1角=10分（1 角可以换 10个 1 分）1元=100分（1 元钱可以换 10 个 10 分，即 100分）2、简单的计算：单位相同，才能相加减
28、。也就是元和元，角和角，分和分单位都相同的才能计算。课本 51 页。3、小数表示法。小数点左边是几表示几元，小数点右边第一位是几表示几角，第二位是几表示几分。写作几元几角几分时，是0 的可以不写出。左右元。角分小数点六、100 以内的加法和减法1、100 以内的加减法的口算，相同数位相加减，从个位算起，个位加减个位，十位加减十位。要算得即对又快，必须分清不进位，进位，不精品资料-欢迎下载-欢迎下载 名师归纳-第 5 页，共 30 页 -文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4
29、R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B
30、5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5
31、V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6
32、P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q
33、4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1
34、Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2
35、I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8退位，退位。进位加法可用接数法计算。2、用竖式计算进位加法时：数位对齐，即个位对齐个位，十位对齐十位。从个位算起，个位满10 向十位进 1。十位要加上个位进上来的 1。如：24+8=32 十 个 2 4+1 8 3 2 3、用竖式计算退位减法时：数位对齐，即个位对齐个位，十位对齐十位。从个位算起，个位不够减，向十位退1，个位作 10，个位计算完成后，十位要减去1。如：368=28 十 个。10 3 6 8 2 8 4、各
36、类分解法（1）两位数加、减一位数。不进位：35 +2 =3 7 想：先算：5+2=7 精品资料-欢迎下载-欢迎下载 名师归纳-第 6 页，共 30 页 -文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 H
37、D2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 Z
38、V1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编
39、码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6
40、 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10
41、 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文
42、档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8 30 5 再算：30+7=5 7 进位：35 +8 =43 35+8=43 想：先算：5+8=13 想：先算
43、：35+5=40 30 5 再算：30+13=43 5 3 再算：40+5=45 13 40 不退位：35 2 =3 3 想：先算：52=3 30 5 再算：30+3=33 3 退位：35 8 =27 想：个位不够减，从十位拿出一个10和个位合起来再减，十位 3 个十拿掉 1 个十，剩 2个十，即 20。20 15 先算：15-8=7 精品资料-欢迎下载-欢迎下载 名师归纳-第 7 页，共 30 页 -文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P
44、6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N1
45、0 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8
46、文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X
47、3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7
48、N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4
49、R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B
50、5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8文档编码:CJ6Q4B5X3P6 HD2Y1Q5V7N10 ZV1I2I6P4R8再算：20+7=27 7 个位不够减时，要从十位拿出1 个十，与个位数合在一起再减，同时十位数必须减少 1。（2）两位数加、减整十数35 +20 =55 35 20 =55 想：先算：30+20=50 想：先算：3020=10 30 5 再算：50+5=55 30 5 再算：10+5=15 50 10 5、补充：各部分名称相应计算公式加法算式加数+加数=和加数=和加数减法算式被减数减数=差被减数=差+减数减数=被减数差七、认识时间1、钟面上有什么?时针：