yang bisa tolong dijawab

-22 + -21 = -43
75 + -150 = 75

1) 11+ 19
@ 30

2) 27 + (-b)
@ -27b

3) -22 + (-21)
@ - 43

4) b + (-10) + 70 + 90
@ b + 60 + 90
@ b + 150
@ 150b

5) -1 + (-2) + (-3) + (-4) + 5
@ (-10) + 5
@ -5

6) 75 + (-150)
@ -75

7) (-25) + 100 + 25 + (-30)
@ 100 + (-30)
@ 70


Semoga membantu... ^_^