Question

6.39×36 6.39×83-63.9×1.9的简便运算过程？

Answer 1

   6.39×36 +6.39×83-63.9×1.9

=6.39×36 +6.39×83-6.39×19   .............改写

=6.39×（36+83-19）  ............乘法的分配律

=6.39×100

=639

Answer 2

解原式=6.39×36+6.39×83-6.39×19
=6.39×（36+83-19）
=6.39×100
=639
加油你可以的

Answer 3

原式
＝6.39×36＋6.39×83－6.39×19
＝6.39×（36＋83－19）
＝6.39×100
＝639

Answer 4

6.39×36+6.39×83-63.9×1.9
=6.39×36+6.39×83-6.39×19
=6.39×(36+83-19)
=6.39×100
=639

Answer 5

把63.9变成63.9*10然后简便计算。