Question

(2 3/7 - 1 1/2):5/7 ДАМ 45 БАЛЛ

Answer 1

Ответ:

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Пошаговое объяснение:

Answer 2

To solve the expression (2 3/7 - 1 1/2) ÷ 5/7, let's first convert the mixed numbers to improper fractions:

2 3/7 = (2 * 7 + 3) / 7 = 17/7 1 1/2 = (1 * 2 + 1) / 2 = 3/2

Now, let's subtract the fractions: (17/7 - 3/2) ÷ 5/7

To subtract the fractions, we need a common denominator, which is 14: (17/7 * 2/2 - 3/2) ÷ 5/7 = (34/14 - 3/2) ÷ 5/7

Now, let's perform the subtraction: = (34/14 - (3 * 7)/(2 * 7)) ÷ 5/7 = (34/14 - 21/14) ÷ 5/7 = 13/14 ÷ 5/7

To divide fractions, we multiply by the reciprocal of the second fraction: = 13/14 * 7/5 = (13 * 7) / (14 * 5) = 91/70

Therefore, the expression (2 3/7 - 1 1/2) ÷ 5/7 is equal to 91/70.