Вычеслите 1) 7/8 +5/8*1/3+2/3. 2) (1/6+3/14):(5/21-1/14)​

Question

Вычеслите 1) 7/8 +5/8*1/3+2/3. 2) (1/6+3/14):(5/21-1/14)​

Comments

1) 7/8 +5/8*1/3+2/3 = 1 3/4. 2) (1/6+3/14):(5/21-1/14) = 2 2/7

Answer 1

7/8 + 5/8 · 1/3 + 2/3 = 1 целая 3/4

1) 5/8 · 1/3 = 5/24

2) 7/8 + 5/24 = 21/24 + 5/24 = 26/24 = 13/12 = 1 целая 1/12

3) 1 1/12 + 2/3 = 1 1/12 + 8/12 = 1 9/12 = 1 целая 3/4

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(1/6 + 3/14) : (5/21 - 1/14) = 2 целых 2/7

1) 1/6 + 3/14 = 7/42 + 9/42 = 16/42 = 8/21

2) 5/21 - 1/14 = 10/42 - 3/42 = 7/42 = 1/6

3) 8/21 : 1/6 = 8/21 · 6/1 = (8·2)/(7·1) = 16/7 = 2 целых 2/7