Question

rosolva a seguinte expressao numerica
a) 45-(3.12)+(23.7)-14

b) 120 : 6+50-21

Answer 1

45 - ( 3 . 12 ) + ( 23 . 7 ) - 14 =
45 - 36 + 161 - 14 =
9 + 161 - 14 =
170 - 14 =
 = $156$

120 : 6 + 50 - 21 =
20 + 50 - 21 =
70 - 21 =
= $49$