Question

Ajutor,spuneti-mi cu cit este egal?
-9+(-13)+17+(-6)+11
14+(-8)+(-25)+12+7
43-60+12+39-21
(7-20)×(-3+5)
(-5-7):(-6+2)
In manualul de clasa a Vl (pag 76) exercitiu:4,7

Answer 1

$1)-9+(-13)+17+(-6)+11=\\=-9-13+17-6+11=0\\2)14+(-8)+(-25)+12+7=\\=14-8-25+12+7=0\\3)43-60+12+39-21=13\\4)(7-20)*(-3+5)=\\=(-13)*2=-26\\5)(-5-7):(-6+2)=\\=(-12):(-4)=3$