Question

CALCULOS COMBINADOS

a) -(-3)+(-4+1)-(-30+28)+(15-5) =
b) -(10+2)+(5.(-3)]-(3-2)+(8+12) =


PORFA ES PARA MAÑANA, CON CUENTA PORFISS​

Answer 1

A.

-(-3)+(-4+1)-(-30+28)+(15-5) =

=3−4+1−(−30+28)+15−5

=3+−3−(−30+28)+15−5

=0−(−30+28)+15−5

=0−(−2)+15−5

=2+15−5

=2+10

=12

B.

-(10+2)+(5.(-3)]-(3-2)+(8+12) =

=−12+(5)(−3)−(3−2)+8+12

=−12+−15−(3−2)+8+12

=−27−(3−2)+8+12

=−27−1+8+12

=−28+8+12

=−28+20

=−8