Question

calcule a (+15)(+9) b (-22)+(+31) c (-13)+(-15) d (+29)+(-41) e (-36)+(+17) f (+31)+(-19) g +5+7 h +2-16 i -12-29 j -57+17 k +89-12 l -100-10

Answer 1

a (+15)(+9) = 15 . 9 = 135

b (-22)+(+31) = -22 +31 = +9

c (-13)+(-15) = -13 -15 = -28

d (+29)+(-41) = 29 -41 = - 12

e (-36)+(+17) = -36 +17= - 19

f (+31)+(-19) = 31 - 19 = 12

g +5+7 = 12

h +2-16 = -14

i -12-29  = -41

j -57+17 = - 40

k +89-12 = 77

l -100-10 = -110