) 3 1/8 : (-5/16) + 3 3/4*(-20) б) 1/8 + 3/4 - 5 1/16 По действиям!!!!!!!?!!

Question

) 3 1/8 : (-5/16) + 3 3/4*(-20) б) 1/8 + 3/4 - 5 1/16 По действиям!!!!!!!?!!

Answer 1

Ответ:а)3 1/8÷(-5/16)+3 3/4×(-20)=-85

1)3 1/8÷(-5/16)=25/8×(-16/5)=-10

2)3 3/4×(-20)=15/4×(-20)=-75

3)-10+(-75)=-85

б)1/8+3/4-5 1/6=4 7/24

1)1/8+3/4=7/8

2)7/8- 5 1/6=-4 7/24

Пошаговое объяснение:

Answer 2

Ответ:

А) 3 1/8 : (-5/16) + 3 3/4*(-20) = -85.

1. 3 1/8 = (8 * 3 + 1) / 8 = (24 + 1) / 8 = 25/8.

2. 25/8 : (-5/16) = 25/8 * (-16/5) = (5 * (-2)) / (1 * 1) = -10/1 = -10.

3. 3 3/4 = (4 * 3 + 3) / 4 = (12 + 3) / 4 = 15/4;

4. 15/4 * (-20) = -15 * 5 = -75.

5. -10 + (-75) = -85.

б) 1/8 + 3/4 - 5 1/16 = -65/16 = - 4 1/16.

1. 5 1/16 = (16 * 5 + 1) / 16 = (80 + 1) / 16 = 81/16.

2. 1/8 + 3/4 = 1/8 + 6/8 = 7/8.

3. 7/8 - 81/16 = 14/16 - 81/16 = -65/16.

Пошаговое объяснение: