-56 +(-48) : 4 - 21 =

-56 + (-48) ÷ 4 - 21
= -56 + ((-48) ÷ 4) - 21
= -56 + (-12) - 21
= -56 - 12 - 21
= -68 - 21
= -89

-48:4=-12
-56-12=-68
-68-21=-89

smoga membantu