Question

Calcule as somas algébricas
A) -21+13+22-19
B) -82+43+45-17
C ) 90-65-35+102+18-160
D) 62-101-94+47+81-36+41

Answer 1

A) -21+13+22-19

$- 21 - 19 + 13 + 22 = \\ - 40 + 35 = \\ - 5$
B) -82+43+45-17
$- 82 - 17 + 43 + 45 = \\ - 99 + 88 = \\ - 11$
C ) 90-65-35+102+18-160
$90 + 102 + 18 - 65 - 35 - 160 = \\ 210 - 260 = \\ - 50$
D) 62-101-94+47+81-36+41
$62 + 47 + 81 + 41 - 101 - 94 - 36 = \\ 231 - 231 = \\ 0$