Предмет: Математика, автор: НадеждаСоколова

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

Ответы

Автор ответа: tadbojarin

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

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