3 + 3 = 6
6 x 3 = 18
18 - 3 = 15
15 + 3 = 18
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(-3)-(4)=(-3)+4=1 Minus times minus equals plus. The reason for this we need not discuss.
-7
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
8060 Source: calculator
32.5 or 32 1/2