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1、v8+( )=13 v8+( )=14 v 8+( )=15v 8+( )=165 56 67 78 8v7+( )=13 v 7+( )=11v7+( )=17 v7+( )=166 610104 49 917 - 9=( )11 - 9=( )19 - 9=( )13 - 9=( )8 82 210104 413-9=413-9=4方法三:方法三:9+(4)=13 13-9=4(做减想加)(做减想加)方法一:方法一:13-3=10 10-6=4(平十法)平十法)方法二:方法二:10-9=1 1+3=4(破十法)(破十法)十几减十几减8、7 拿走8把,还剩多少把?15 - 8 =15 - 8
2、 = ? ?拿走拿走8根,还剩多少根根,还剩多少根?1587想:想:10822+57158 7想:想: 155101037158 7想:想:8+( )15158778 86 6先圈一圈,再计算。先圈一圈,再计算。 4 47 74 47 7第一关第一关14颗颗?颗?颗?个?个16个个6 69 9第二关第二关11317912558411-8 = 2+1 =312-8 =13-8 =14-8 =16-8 =15-8 =17-8 =2+2 =42+3 =52+4 =62+5 =72+6 =82+7 =9 十十几几8=几几加加211-7 = 3+1 =412-7 =13-7 =14-7 =16-7 =15-7 =3+2 =53+3 =63+4 =73+5 =83+6 =9 十十几几7=几几加加3 十几十几9=几加几加111 9 = 212 9 = 313 9 = 414 9 = 515 9 = 616 9 = 717 9 = 818 9 = 9 十几十几8=几加几加211 8 = 312 8 = 413 8 = 514 8 = 615 8 = 716 8 = 817 8 = 9 十几十几7=几加几加311 7 = 412 7 = 513 7 = 614 7 = 615 7 = 816 7 =97 76 6