Question

446 пж 60 баллов очень срочно

Answer 1

Ответ:

Пошаговое объяснение:

1) 3 1/8 -(4 5/16 + 1 1/4) = 3 1/8 - ( 4 5/16 + 1 (4*1)/(4*4))= 3 1/8 - ( 4 5/16 + 1 4/16)=

3 1/8 - 5 9/16= 3 (1*2)/(8*2) - 5 9/16 = 3 2/16 - 5 9/16 = - 2 7/16

2) - 7 3/5 - ( - 4 1/15 - 5 2/3)= - 7 3/5 - ( -4 1/15 - 5 (2*5)/(3*5))=

-7 3/5 - ( -4 1/15 - 5 10/15)= - 7 3/5 +  9 11/15 = - 7 (3*3)/(3*5) + 9 11/15=

-7 9/15 + 9 11/15 = 2 2/15

3) -3 1/2 - ( 5 3/4 + 2 7/20)= - 3 (1*10)/(2*10)- ( 5 (3*5)/(4*5) + 2 7/20)=

- 3 1/2 - ( 5 15/20 + 2 7/20)= - 3 1/2 - 7 22/20= -3 1/2 - 8 2/20=

-3 1/2 - 8 1/10 = - 3 5/10 - 8 1/10=-  11 6/10= - 11 3/5

4) -1/3 -(- 3 7/18 -5 8/9)= -1/3 - ( - 3 7/18 - 5 16/18)=-1/3 - ( -8 23/18)=

-1/3 + 8 23/18 = -6/18 +8 23/18 = 8 17/18