Question

7 - Resolva as expressões:
)16 + 25 − 56 + (3 ∙ 18): 3 =
B) (78 − 54 + 21: 3) . 9 =

Answer 1

16 + 25 - 56 + (3.18) : 3 =
16 + 25 - 56 + ( 54 : 3 ) =
16 + 25 - 56 + 18 =
59 - 56 =
3

B) ( 78 - 54 + 21:3) . 9 =
(78 - 54 + 7 ) .9 =
31.9=
279

Answer 2

$a)16 + 25 - 56 + (3 \times 18) \div 3 \\ 16 + 25 - 56 + 54 \div 3 \\ 16 + 25 - 56 + 18 \\ 59 - 56 \\ \boxed{3}$

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$b)(78 - 54 + 21 \div 3) \times 9 \\ (78 - 54 + 7) \times 9 \\ 31 \times 9 \\ \boxed{279}$

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Att, IzabelaCristina2006 ❤️ ♈