78.5*0.81+7.85*1.9如何简算

2024-12-27 11:21:12
推荐回答(3个)
回答1:

78.5*(0.81+1.9)
=78.5*2.71
=212.735(约等于212.7)

回答2:

其他人的答案都是错的,应该是
78.5×0.81+78.5×0.19
=(0.81+0.19)×78.9
=1×78.9
=78.9

回答3:

7.85*(0.81+1.9)=。。。。0.81或者1.9小数点没错么?