Question

下面各题怎样简便就怎样算.8/5(八分之五)+5/4(五分之四)-8/1(八分之一)+1.2=12.7*6-12.7*5

Answer 1

5/8+4/5-1/8+1.2

=4/8+4/5+6/5

=0.5+2

=2.5

12.7*6-12.7*5+7/10

=12.7*(6-5)+0.7

=13.4