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1、六年级数学简便计算练习题答案:.doc 六年级数学总复习简便计算练习题 一、口算。( 10 分) 100 0 9 24 60 6 = =5-3=2 80 =80* 1 =10 3 31=3*1 1 = 1 8 7 7 7 3 7 49 90 分, 4 2052) 二、用简便方法计算下面各题。( 1125 997 998+1246 4 1 +5 2 + 12 2 (1 2+22 ) 400 1258 25 ( 37 8) 3 3 5 7 5 =1125- (1000-3 ) = (998+2)+(1246-2 ) = (4 1 5 2 )+(+)=12 2 -2 2 1 2 =400( 125*
2、8 ) =25*8*37 3 3 5 5 7 =1125-1000+3 =1000+1244 =10+10=20 =10-1 2 =85 =400 1000= 2 =200*37=7400 =125+3=128 =2244 7 7 5 ( 11)12 1 3244 34 (2 13 ) 125 99 4 6 4 15 7 34 =( 6 4 )*12 = 724 4 =34 234 13 =125* (8+) = ( +) +( +) =*(99+1) 24 24 4 15 7 34 =2 *12 = (74)*2 4 =68+13 =125*8+125* =8+8=16 =*100=340
3、24 4 7 15 =1 =1*2 4=24 =81 =1000+100=1100 15 15 六年级数学总复习简便计算练习题 一、口算。( 10 分) 100 0 9 24 60 6 = =5-3=2 80 =80* 1 =10 3 31=3*1 1 = 1 8 7 7 7 3 7 49 90 分, 4 2052) 二、用简便方法计算下面各题。( 1125 997 998+1246 4 1 +5 2 + 12 2 (1 2+22 ) 400 1258 25 ( 37 8) 3 3 5 7 5 =1125- (1000-3 ) = (998+2)+(1246-2 ) = (4 1 5 2 )+
4、(+)=12 2 -2 2 1 2 =400( 125*8 ) =25*8*37 3 3 5 5 7 =1125-1000+3 =1000+1244 =10+10=20 =10-1 2 =85 =400 1000= 2 =200*37=7400 =125+3=128 =2244 7 7 5 ( 11)12 1 3244 34 (2 13 ) 125 99 4 6 4 15 7 34 =( 6 4 )*12 = 724 4 =34 234 13 =125* (8+) = ( +) +( +) =*(99+1) 24 24 4 15 7 34 =2 *12 = (74)*2 4 =68+13 =125*8+125* =8+8=16 =*100=340 24 4 7 15 =1 =1*2 4=24 =81 =1000+100=1100 15 15