выполните действия.7 3/4-(4 5/6-3 12)+1 2/3=.9 2/5-(8 1/3-7 1/4+5 1/6)=.(6 5/8-1/2)-(5 3/4-2 1/6)+(9 5/8-7 1/3)=.(5 1/30-2 3/5-2/15+6)-(7-6 11/12+1/4)=

Ответ учителя по предмету Математика

7 3/4-(4 5/6- 3 1/2)+ 1 2/3 = 8 1/12

1) 4 5/6 — 3 1/2 = 4 5/6 — 3 3/6 = 1 2/6 = 1 1/3

2) 7 3/4 — 1 1/3 = 7 9/12 — 1 4/12 = 6 5/12

3) 6 5/12 + 1 2/3 = 6 5/12 + 1 8/12 = 7 13/12 = 8 1/12

9 2/5-(8 1/3 — 7  1/4 + 5 1/6) = 3,15

1) 8 1/3 — 7 1/4 = 8 4/12 — 7 3/12 = 1 1/12

2) 1 1/12 + 5 1/6 = 1 1/12 + 5 2/12 = 6 3/12 = 6 1/4

3) 9 2/5 — 6 1/4 = 9 8/20 — 6 5/12 = 3 3/20 = 3,15

(6 5/8- 1/2)- (5 3/4- 2 1/6) + (9 5/8 — 7 1/3) = 4 17/24

1) 6 5/8 — 1/2 = 6 5/8 — 4/8 = 6 1/8

2) 5 3/4 — 2 1/6 = 5 9/12 — 2 2/12 = 3 7/12

3) 9 5/8 — 7 1/3 = 9 15/24 — 7 8/24 = 2 7/24

4) 6 1/8-3 7/12 = 6 3/24 — 3 17/24 = 5 27/24 — 3 17/24 = 2 10/24

5) 2 10/24 + 2  7 /24 = 4 17/24

(5 1/30 — 2 3/5 — 2/15 + 6 ) — (7 — 6 11/12 + 1/4) = 7 29/30

1) 5 1/30 — 2 3/5 = 5 1/30 — 2 18/30 = 4 31/30 — 2 18/30 = 2 13/30

2) 2 13/30 -2/15 = 2 13/30 — 4/30 = 2 9/30 = 2 3/10

3) 2 3/10 + 6 = 8 3/10

4) 7 — 6 11/12 = 6 12/12 — 6 11/12 = 1/12

5) 1/12+ 1/4 = 1/12 + 3/12 = 4/12 = 1/3

6) 8 3/10 — 1/3 = 8 9/30 — 10/30 = 7 39/30 — 10/30 = 7 29/30