Question

Помогите решить пожалуйста дам 30 баллов ​

Answer 1

Ответ:

первые два решены (верно)

-5 1/2 + (-5 1/2) = - ( (5+5) + (1/2+1/2) ) = - (10+1) = - 11

-7 7/8 + (-7 1/16) = - ( (7+7) + (14/16+1/16) ) = - (14 + 15/16) = - 14 15/16

- ( (2+1) + (3/10+1/10) ) = - 3 3/10

10 - 225 = - (225 - 10) = - 215

0 - 1 7/9 = - 1 7/9

-15 - (-5 1/8) = - (14 8/8 - 5 1/8) = - ( (14-5) + (8/8-1/8) ) = - 9 7/8

(-20+8) + (-6) = - 12 - 6 = -( 12+6) = - 18

Answer 2

Пошаговое объяснение:

1) -23+(-87)= - 23-87= - 110

2) -304+(-96)= - 304-96= - 400

3) -89+89=0

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

=(-5-5)+(-1/2-1/2)= - 10+(-2/2)= - 10-1= - 11

5) - 7 7/8+(-7 1/16)= - 7 7/8-7 1/16=

= - 7 14/16-7 1/16=(-7-7)+(-14/16-1/16)=

= - 14+(-15/16)= - 14-15/16= - 14 15/16

6) - 2 3/10-1 1/10=(-2-1)+(-3/10-1/10)=

= - 3-4/10= - 3 4/10= - 3 2/5= - 3,4

7) 10-225= - 215

8) 0-1 7/9= - 1 7/9

9) - 15-(-5 1/8)= - 15+5 1/8= -14 8/8+5 1/8=

= (-14+5)+(-8/8+1/8)= - 9-7/8= - 9 7/8

10) (-20+8)+(-6)= - 12-6= - 18