Question

a) -2-13+(-14)-19

b) 221 + 4[(-5).8-4]

c) (-2)³.(-2)²+32

d) -15.12 - 8.(-12)

Answer 1

a)-2-13+(-14)-19

= - 48

b) 221+4[(-5).8-4]

=221+4(-40-4)

=221+4(-44)

=221-176

=45

c)\(\left(-2\right)^3.\left(-2\right)^2+32\)

=\(-8\cdot4+32\)

\(=-32+32=0\)

d) \(-15\cdot12-8\cdot\left(-12\right)\)

\(=15\cdot\left(-12\right)-8\cdot\left(-12\right)\)

\(=\left(-12\right)\left(15-8\right)\)

\(=\left(-12\right)\cdot7\)

\(=-84\)

Answer 2

a) -2 - 13 + (-14) - 19 = -48

b) 221 + 4\([\left(-5\right).8-4]\)= 45

c) (-2)³.(-2)² + 32 = (-2)⁵ + 32 = -32 + 32 = 0

d) -15.12 - 8.(-12) = 15.(-12) - 8.(-12)

                             = (-12).(15 - 8)

                             = (-12).7 = -84

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