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64×99用简便计算

64×99 =64×(100-1) =64×100-64×1 =6400-64 =6336

99x64 =(100-1)x64 =100x64-1x64 =6400-64 =6336 谢谢,请采纳

99x64 =(100-1)*64 =100*64-64 =6400-64 =6336

64×99+64怎么用简便计算 =64x(99+1) =64x100 =6400

99×64+64 =(99+1)×64 =640

64x(100-1)=64x100-64x1=6400-64=6336

99×9 =(100-1)×9 =100×9-9 =900-9 =891

47×99+47 =47×99+47×1 =47×(99+1) =47×100 =4700 解析:首先把加号后的47变成(47×1),然后将47提取后,把99和1相加的和,再乘以47即可得出结果。此题主要是考察乘法分配律的灵活运用。 乘法分配律的概念为:两个数的和,乘以一个数,可...

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