Question

Utilizando propriedade associativa, resolva os cálculos associando as parcelas de duas maneiras.

a) (-19) + (-11) + (+17) =
b) (+13) + (-31) + (+19) =
c) (-9,3) + (+15,2) + (+10,1) =
d) (+154) +,5) + (-12,4) + (+8,1) =
e) (+9,25) + (-17,54) + (-2,87) =

Answer 1

a) (-19) + (-11) + (+17) = -19-11+17 = - 13
b) (+13) + (-31) + (+19) = 13-31+19 = 1
c) (-9,3) + (+15,2) + (+10,1) = -9,3+15,2+10,2 = 16,1
d) (+154) +,5) + (-12,4) + (+8,1) = 154+5-12,4+8,1 = 154,7
e) (+9,25) + (-17,54) + (-2,87) = 9,25-17,54-2,87= - 11,16