Question

Olá
me ajude
por favor ​

Answer 1

Resposta:

$1 - \\ a)( - 10) \times ( - 5) = 50 \\ b)( - 2) \times ( - 9) = 18 \\ c)( - 14) \times ( - 3) = 42 \\ d)( - 3) \times ( - 2) \times ( - 10) = - 60 \\ e)( - 12) \div ( - 2) = 6 \\ f)( - 7) \div ( - 7) = 1 \\ g)( + 30) \div ( - 2) = - 15 \\ h)( + 45) \div ( - 5) = - 9$

$2 - \\ c) {( - 6)}^{2} = + 36 \\ d) {( - 8)}^{2} = + 48 \\ e) {( - 2)}^{3} = - 8 \\ f) {( - 7)}^{2} = + 49$

$3 - \\ a) - 3 - (5 + 1) + (6 + 1) = \\ - 3 - ( + 6) + ( + 7) = \\ - 3 - 6 + 7 = \\ - 9 + 7 = - 2 \\ b) - 18 + (5 - 7) + 9 - (4 - 8) + 2 = \\ - 18 + ( - 2) + 9 - ( - 4) + 2 = \\ - 18 - 2 + 9 + 4 + 2 = \\ - 20 + 13 + 2 = \\ - 7 + 2 = - 5 \\ c)10 - 3 - (9 + 1) + ( - 14 + 1) + 6 - 2 = \\ 10 - 3 - ( + 10) + ( - 13) + 6 - 2 = \\ 10 - 3 - 10 - 13 + 6 - 2 = \\ 7 - 23 + 4 = \\ - 16 + 4 = - 12 \\ d) - 23 - (10 + 1) + 2 - 3 + (16 + 1) - 5 = \\ - 23 - ( + 11) + 2 - 3 + ( + 17) - 5 = \\ - 23 - 11 + 2 - 3 + 17 - 5 = \\ - 34 - 1 + 12 = \\ - 35 + 12 = - 23$

$3 - \\ (b) - 5 \\ (a) - 2 \\ (d) - 23 \\ (c) - 12$