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四年级下册数学简便算法练习题一运用加法运算定律在?括号里里填上合适的数271919( )?? ? 18323( ???)183?? a( )??=10( )??23043=( )??( ??) 287129118287( 118?)(3247)6532(? ? ??) (7536)6475(
四年级数学下册简便运算练习题一填空1.用字母abc表示下面运算定律:(l)加法交换律(??????????????????????? )(2)乘法分配律(????????????????? )(3)乘法交换律(??????????????????? )(4)加法结合律(????????????? )(5)乘法结合律(?????????????????? )2.45×(20×39)(45×20)×3
四年级数学下册简便运算练习题125×32 25×46 101×56 99×26 1022-478-422 987-(287135) 478-256-144 672-36-64 3664-3664 487-287-139-61 500-257-34-143 2000-368-132 1814-3
1请你做法官:326-72 28 = 326-(72 28) ( )改:73 37-73 37 = 0 ( )改:2怎样简便就怎样算14537822255 986213-486187 1069-(269-194)861-98 963-106 368105 458 94
四年级数学下册简便运算专题练习简便计算练习题1 158262138 375219381225 5001-247-1021-232 (1812564)2719 37844114242222 276228353219 (3751034)(966125) (2130783270)1017 9999999999999
四年级数学下册简便运算练习题125×32 25×46 101×56 99×26 1022-478-422 987-(287135) 478-256-144 672-36-64 3664-3664 487-287-139-61 89×9989 2000-368-132
四年级数学下册简便运算专题练习简便计算练习题1 得分 158262138 375219381225 5001-247-1021-232 (1812564)2719 37844114242222 276228353219 (3751034)(966125) (2130783270)101
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简便运算习题加法交换律ab=ba如:152389348=152348399=500399=899习题:775623 165477135 15428846加法结合律abc=a(bc)如:591482118=591(482118)=591600=1191习题:285147253 99178122 456588412
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