Question

1. Найдите значение выражения 1. 5+².(-21)- 3. 2- + (-88) 12/2. 3 10 2. -2:57:15 4. 80/7 - СРОЧНО КОНТРАХА ЗАВТРА 6 КЛАСС​

Answer 1

Пошаговое объяснение:

№1

1) 2/3 * (-2 1/2) = 2/3 * (-5/2) = -5/3 = -1 2/3

2) 5 + (-1 2/3) = 5 - 1 2/3 = 4 3/3 - 1 2/3 = 3 1/3

№2

1) -2 : 5 1/3 = -2 : 16/3 = -2 * 3/16 = -6/16 = -3/8

2) 7/10 : 1 1/15 = 7/10 : 16/15 = 7/10 * 15/16 = 7/2 * 3/16 = 21/32

3) -3/8 - 21/32 = -12/32 - 21/32 = -33/32 = -1 1/32

№3

1) 2 1/5 * 1/3 = 11/5 * 1/3 = 11/15

2) -3/10 : 1 1/2 = -3/10 : 3/2 = -3/10 * 2/3 = -2/10 = -1/5

3) 11/15 + (-1/5) = 11/15 - 1/5 = 11/15 - 3/15 = 8/15

№4

1) 1 1/8 * 2/9 = 9/8 * 2/9 = 1/4 * 1/1 = 1/4

2) 1 1/4 - 1/4 = 1

3) 3/7 - 1 = 3/7 - 7/7 = -4/7