Question

calcule as somas usando as regrinhas de sinais a) (-8)+(-4)
-10 + -9
+11 + -3
-15+ +26
+1 + -8
-19 + 0
+5 + -13
-70 + -9
+15 + -13
-20 + -19
+28 + +15
Me ajudem pfvr​

Answer 1

Resposta:

a)-8-4= -12

b)-10-9= -19

c)11-3= 8

d)-15+26= 11

e)1-8=-7

f)-19+0=-19

g)5-13=-8

h)-70-9= -79

i)15-13= 2

j)20-19=1

k)28+15= 43

- com - = -

- com + = -

+ com += +