пж помогие
даю 70 баллов
Ответы на вопрос
Ответ:
Пошаговое объяснение:
(1)
1) 4 2/3 * 6 = 14/3 * 6 = 28
2) 1 23/42 * 3 1/13 = 65/42 * 40/13 = 100/21 = 4 16/21
3) 2 1/8 * 1 29/51 = 17/8 * 80/51 = 10/3 = 3 1/3
4) 28 - 4 16/21 = 23 5/21
4) 23 5/21 + 3 1/3 = 23 5/21 + 3 7/21 = 26 12/21 = 26 4/7
ответ: 26 4/7
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(2)
1) 3 4/5 * 13/38 = 19/5 * 13/38 = 13/10 = 1 3/10
2) 5 3/10 - 1 3/10 = 4
3) 4 * 5/84 = 5/21
4) 2 1/12 * 4/15 = 25/12 * 4/15 = 5/9
5) 5/21 + 5/9 = 15/63 + 35/63 = 50/63
ответ: 50/63
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(3)
1) (3 1/3)² = 3 1/3 * 3 1/3 = 10/3 * 10/3 = 100/9 = 11 1/9
2) 2 13/16 * 2 2/5 = 45/16 * 12/5 = 27/4 = 6 3/4
3) 11 1/9 - 6 3/4 = 11 4/36 - 6 27/36 = 4 13/36
ответ: 4 13/36
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(4)
1) (5/12 + 13/20) = 25/60 + 39/60 = 64/60 = 16/15
2) 16/15 * 16/15 = 256/225
3) 256/225 * 1 13/32 = 256/225 * 45/32 = 8/5 = 1 3/5
ответ: 1 3/5