Question

9. Выполните действия. 1)-7 (-6) +17 3)-4 (-3): 12 2)-27: (-3) - 10 4)-64 (-8): (-4)​

Answer 1

$1) \: \: \: - 7 \times ( - 6) + 17 = 42 + 17 = 59 \\ 3) \: \: \: - 4 \times ( - 3) \div 12 = 12 \div 12 = 1 \: \: \\ 2) \: \: \: - 27 \div ( - 3) - 10 = 9 - 10 = - 1 \\ 4) \: \: \: - 64 \times ( - 8) \div ( - 4) = - 64 \times 2 = - 128$