78点5×10点一的简便运算是?急需解决。。。谢了

2025-06-22 18:23:39
推荐回答(2个)
回答1:

78.5*10.1
=78.5*(10+0.1)
=78.5*10+78.5*0.1
=785+7.85
=792.85

回答2:

78.5X10.1=78.5X10+78.5X0.1=785+7.85=792.85