78.5×0.81+7.85×1.9 过程

2025-04-04 04:35:38
推荐回答(3个)
回答1:

 

回答2:

135.7265

回答3:

78.5X0.81+7.85X1.9
=7.85x8.1+7.85x1.9
=7.85x(8.1+1.9)
=7.85x10
=78.5