Вычислите:

1) (-3/14-8/21) : 20/21

2) 3/8: (-5/8) - (-2 1/4) : (-1 4/11)

Question

Математика

Феосовия

15 марта, 14:38

Вычислите:

1) (-3/14-8/21) : 20/21

2) 3/8: (-5/8) - (-2 1/4) : (-1 4/11)

+2

Ответы (1)

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Толяша · Answer 1

1) (-3/14 - 8/21) : 20/21 = - 5/8

1. 03/14-8/21 = - 9/42-16/42 = - 25/42

2. - 25/42:20/21 = - 25/42*21/20 = - 5/8

2) 3/8 : (-5/8) - (-2 1/4) : (-1 4/11) = - 2 1/4

1. 3/8: (-5/8) = 3/8 * (-8/5) = - 3/5

2. - 2 1/4: (-1 4/11) = - 9/4 * (-11/15) = 33/20 = 1 13/20

3. - 3/5-1 13/20 = - 3/5-33/20 = - 12/20-33/20 = - 45/20 = - 2 1/4

Вычислите:1) (-3/14-8/21) : 20/212) 3/8: (-5/8) - (-2 1/4) : (-1 4/11)

Вычислите:

1) (-3/14-8/21) : 20/21

2) 3/8: (-5/8) - (-2 1/4) : (-1 4/11)