Ответ:

Пошаговое объяснение:

1) 1 5/7 * 6 1/8 = 12/7 * 49/8 = 21/2 = 10 1/2

2) 3 5/9 * 5 1/4 = 32/9 * 21/4 = 56/3 = 18 2/3

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№2

15 4/9 - 4 4/9 * 3 3/8 = 4/9

1) 4 4/9 * 3 3/8 = 40/9 * 27/8 = 15

2) 15 4/9 - 15 = 4/9

ответ: 4/9

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(5 1/16 - 1 1/8)(5/6 + 3/14) = 4 1/8

1) 5 1/16 - 1 1/8 = 5 1/16 - 1 2/16 = 3 15/16

2) 5/6 + 3/14 = 35/42 + 9/42 = 44/42

3) 3 15/16 * 44/42 = 63/16 * 44/42 = 33/8 = 4 1/8

ответ: 4 1/8

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№3

70 2/5 * 6 1/4 = 352/5 * 25/4 = 440руб стоят 6 1/4кг конфет