Question

Выполните действия 5/6+ 1/4. 7/8– 5/6. 3/10– 4/15. 5– 3 2/7. 4/9*3/8. 5/8:9/10. 6 3/5*10

Answer 1

5/6+ 1/4=10/12+3/12=13/12=1 1/12
 7/8– 5/6=21/24-20/24=1/24 
 3/10– 4/15=9/30-8/30=1/30   
5– 3 2/7=4 7/7-3 2/7=1 5/7 
4/9*3/8=1/3*1/4=1/12 
5/8:9/10=5/8*10/9=5/4*5/9=25/36 
 6 3/5*10=33/5*10=330/5=66

Answer 2

Давайте выполним эти действия по порядку:

1. 5/6 + 1/4 = (10/12) + (3/12) = 13/12

2. 7/8 - 5/6 = (21/24) - (20/24) = 1/24

3. 3/10 - 4/15 = (9/30) - (8/30) = 1/30

4. 5 - 3 2/7 = 5 - (23/7) = (35/7) - (23/7) = 12/7

5. 4/9 * 3/8 = (43)/(98) = 12/72 = 1/6

6. 5/8 : 9/10 = (5/8) * (10/9) = 50/72 = 25/36

7. 6 3/5 * 10 = (33/5) * 10 = 330/5 = 66

Таким образом: 5/6 + 1/4 = 13/12 7/8 - 5/6 = 1/24 3/10 - 4/15 = 1/30 5 - 3 2/7 = 12/7 4/9 * 3/8 = 1/6 5/8 : 9/10 = 25/36 6 3/5 * 10 = 66