Question

Пожалуйста помогите математика ​

Answer 1

Ответ:

1)

7 3/20-5 1/12=7 9/60-5 5/60=

=2 4/60=2 1/15

2 1/15×1.5=2 1/15×1 1/2=

=31/15×3/2=31/10

6 3/7×1.4=6 3/7×1 2/5=

=45/7×7/5=9

9÷1.8=5

31/10÷5=31/10×1/5=31/50

2)

5.7÷0.3=19

19-8 1/3=18 3/3-8 1/3=10 2/3

10 2/3×0.75=10 2/3×3/4=

=32/3×3/4=8

2 1/8+1.75=2 1/8+1 3/4=

=2 1/8+1 6/8=3 7/8

3 7/8÷15.5=3 7/8÷15 1/2=

=31/8÷31/2=31/8×2/31=1/4

8÷1/4=8×4/1=32