Question

Efetue as somas algébricas:

a) +6+7-5-8+10-1+3=

b) -12+11+12-7-9+14-20=

c) -9-7+12-27+34-15-12=
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Answer 1

Resposta:

A) =+13−5−8+10−1+3=

=+8−8+10−1+3=

=+0+10−1+3=

=+10−1+3=

=+9+3=

=12

B) =−1+12−7−9+14−20=

=11−7−9+14−20=

=4−9+14−20=

=−5+14−20=

=9−20=

=−11

C) =−16+12−27+34−15−12=

=−4−27+34−15−12=

=−31+34−15−12=

=3−15−12=

=−12−12=

=−24