Find missing integer to complete the addition sentence:

-6+_____=-12

Find missing integer to complete the addition sentence:

-6+_____=-20

Find missing integer to complete the addition sentence:

-15+_____=-20

Find missing integer to complete the addition sentence:

-10+10=_______.

Find missing integer to complete the addition sentence:

_____+3=-12

Find missing integer to complete the addition sentence:

-10+3=______.

Find missing integer to complete the addition sentence:

_____+(-3)=-20

Find missing integer to complete the addition sentence:

-40+30=_______.

Find missing integer to complete the addition sentence:

-50+60=______.

Find missing integer to complete the addition sentence:

______+30=-40