1樓：蟑螂花語
=25×4×125×8×20×5×7
=100×1000×100×7
=70000000
用簡便方法計算25x7xⅰ25x5x4x8x20
2樓：匿名使用者
(25x4) x (125x8 )x(5x20)x7
=100x1000x100x7
=70000000
3樓：蟑螂花語
=25×4×125×8×20×5×7
=100×1000×100×7
=70000000
25x7x4x5的簡便計算
4樓：o海先森
25x7x4x5
=（25x4）x（5x7）
=100x35
=3500
用簡便方法計算下面各題 25x45x4 20x67x5 46x4x2
5樓：
25x45x4
=25x4x45
=100x45
=4500
20x67x5
=20x5x67
=100x67
=6700
46x4x2
=(50-4)x2x4
=50x2x4-4x2x4
=100x4-8x4
=400-32
=368
125x4x8
=125x8x4
=1000x4
=4000
6樓：
25x4)x2125x4x45x46x5x8x4x20x67
四年級上冊簡便計算題簡單 25x3x4 25x6x2 36x25 25x13x125x3
7樓：匿名使用者
先要知道；25x4＝100 125x8＝100025x3x4 ＝100x3＝300
125x25x32＝125x25x8x4＝125x8x25x4＝1000x100＝100000
102x76＝（100+2）x76＝100x76+2x76＝7600+152＝7752
45x4x5＝9x5x4x5＝9x25x4＝9x100＝90023x5x2＝23x10＝230
25x9x4＝25x4x9＝100x9＝900
20x25x4，12x8x5，6x31x15，25x3x8，189x50x2，8x4x25x125
8樓：摯愛和你共亨
20x(25x4)=20x100=2000
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