Question

1) (2/7+5/21)/1 4/7 2)(8/11+3/22)/5/11 3)1 7/12/ (3/8+5/120

Answer 1

Вот я по действиям подробно сделала все♡ ♡

Answer 2

1) First, simplify the fractions within the parentheses: 2/7 + 5/21 = 6/21 + 5/21 = 11/21 8/11 + 3/22 = 16/22 + 3/22 = 19/22 3/8 + 5/120 = 45/120 + 5/120 = 50/120 = 5/12

2) Then, simplify the expressions in the parentheses: (11/21) / (1 + 4/7) = (11/21) / (11/7) = (11/21) * (7/11) = 7/21 = 1/3 (19/22) / (5/11) = (19/22) * (11/5) = 209/110

3) Finally, add the remaining fractions: 1 + 7/12 + 1/3 + 209/110 = 1 + 7/12 + 1/3 + 209/110 = 1 + 35/60 + 20/60 + 209/110 = 1 + 55/60 + 209/110 = 1 + 11/12 + 209/110 = 1 + (110/110)(11/12) + 209/110 = 1 + 110/110 + 209/110 = 1 + 1 + 209/110 = 2 + 209/110 = 2 + (2/110)(209) = 2 + 418/110 = 2 + (110/110)(4) + (8/110)(4) = 2 + 4 + 8/110 = 6 + 8/110 = 6 + (2/110)(4) + (4/110)(2) = 6 + 2/55 + 4/55 = 6 + 6/55 = 6 6/55

So, the final answer is 6 6/55.