简便运算:8.42×9.6+842×0.4
问题描述:
简便运算:8.42×9.6+842×0.4
答
解
如果是这样答案为:
8.42x9.6+8.42x0.4
=8.42x(9.6+0.4)
=8.42x10
=84.2
确定题目正确.