-9 x -8 = +72
negative x negative = positive
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-4/9 × 9/10 × -5/8 = (-4 × 9 × -5) / (9 × 10 × 8) = 180/720 = 1/4 or .25
well a positive times a negative equals a negative so if the problem was -8 times 9 it would equal -72
Negative 1 times 8 is negative 8. -1 x 8 = -8
8.0 × 10-9 written in regular notation is: 0.0000000080
negative 9