use mental math to simplify each expression 5 dot 7 dot(-2) 8 dot 4 dot(-10)

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Originally Posted by dianna use mental math to simplify each expression 5 dot 7 dot(-2) 8 dot 4 dot(-10) I don't know about "mental math" but: 5 dot 7 dot(-2) = 35 dot (-2) = -70 8 dot 4 dot(-10) = 32 dot (-10) = -320 -Dan