tolong bantu ya kak 11-15

11. 8+6×(-7)-(-5)
= 8+(-42)+5
=(-34)+5
=(-29)

12. 32-40:(-8)+12
= 32- (-5)+12
= 32+5 + 12
= 49

13. 35:(-7)+15-(-2)
= (-5) +15+2
= 12

14. 6+(-15)×(-4)-(-7)
= 6+60+7
= 73

15. 8-(-45):15+8
= 8+45:15+8
= 8+3+8
= 19