(7 x 10) - 4 = 66
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-28
plus times plus = plus minus times plus = minus plus times minus = minus minus times minus = plus so when you subtract a number it is the same as adding its negative; for example 7 - 4 = 3 7 + (1)(-4) = 3
7/10 - 2/5(4/10) = 3/10
-4 + -3 = -7
7 + 90 / 9 + 10 + 42 - 7 7 + 10 + 10 + 16 - 7 36