Question

分数加减计算(过程)1.3又13/16减7又19/48加9又7/12 2.12减6又3/8加2又1/10

Answer 1

分数加减计算基本上是通分

1) 3又13/16-7又19/48+9又7/12 ,公倍数是48,将整数部分提出

=(3-7+9)+(13/16-19/48+7/12)

= 5 + (39-19+28)/48

= 5 + 48/48

= 6

2) 12减6又3/8加2又1/10

= (12-6+2)+(-3/8+1/10),公倍数40

= 8+(-15+4)/40

= 8-11/40

= 7又29/40