Question

Calcule: letra (a) (+11) +(-9) = letra (b) (-72)+(+60)= letra (c) (+91) + (-221)= letra (d) (-72)+(+48)= letra (e) (-21) +(+20)= letra (f) (-100)+ (+109)= (g) (+91) + (-221)= (h) (-85) +(+100)=

Answer 1

a) 11+(-9)= 2
b) -72+60= -12
c) 91+(-221)= -130
d) -72+48= -24
e) -21+20= -1
f) -100+109= 9
g) 91+(-221)= -130
h) -85+100= 15