根据65×39=2535,在下面的括号里填上合适的数.你能想出几种填法?
1个回答

解题思路:积的变化规律:一个因数不变,另一个因数扩大或缩小几倍(0除外),积也就扩大或缩小相同的倍数;据此解答.

25.35=6.5×3.9

=0.65×39

=0.065×390

=0.0065×3900

2.535=6.5×0.39

=0.65×3.9

=0.065×39

=65×0.039.

故答案为:6.5,3.9,0.65,39,0.065,390,0.0065,3900,6.5,0.39,0.65,3.9,0.065,39,65,0.039.

点评:

本题考点: 积的变化规律.

考点点评: 此题主要考查乘法算式中两个因数的变化引起积的变化规律.