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Algebra
Operations with integers
Multiplication and Division of Integers
\[-8 \times (-10) - 7 \times \dfrac{1}{-1}\]
1 answer
First, we simplify the expression within the parenthesis: \[7 \times \dfrac{1}{-1} = 7 \times -1 = -7.\] Next, we perform the multiplication: \[-8 \times (-10) = 80.\] Therefore, \[-8 \times (-10) - 7 \times \dfrac{1}{-1} = 80 - (-7) = 80 + 7 = \boxed{87}.\]
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