Сравнтте:-6 - (-9) и6-9; 1/2-3 и3-1/2

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Математика

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20 ноября, 03:57

Сравнтте:-6 - (-9) и6-9; 1/2-3 и3-1/2

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Авксентий · Answer 1

8/15 * 25/32 + 1 3/4 = 2 1/12

1) 8/15 * 25/32 = 5/12

2) 5/12 + 1 3/4 = 5/12 + 1 9/12 = 1 14/12 = 2 2/12 = 2 1/2

2 1/6 - 2/3 * 7/12 = 1 7/9

1) 2/3 * 7/12 = 7/18

2) 2 1/6 - 7/18 = 2 3/18 - 7/18 = 1 21/18 - 7/18 = 1 14/18 = 1 7/9

1/2 * 1 2/3 : 10 = 1/12

1) 1/2 * 5/3 = 5/6

2) 5/6 : 10 = 5/6 * 1/10 = 5/60 = 1/12

(1 - 1/2) : (1/2 - 1/3) = 3

1) 1 - 1/2 = 1/2

2) 1/2 - 1/3 = 3/6 - 2/6 = 1/6

3) 1/2 : 1/6 = 1/2 * 6/1 = 6/2 = 3