78⼀七分之八加八分之五乘以7 +0.875等于多少用简便方法计算?

2024-11-29 20:51:25
推荐回答(1个)
回答1:

78÷8/7+5/8x7+0.875
=78x7/8+5x7/8+7/8
=(78+5+1)x7/8
=84x7/8
=147/2