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Anonymous
If you mean 668 minus 412 then it is 256
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-5 + (-4) - 12 - 20 - (-10) + 6 = -25
3/4 minus 1/6 is 7/12
5/6 minus 3/4 is 1/12
5/12 - 1/4 = 5/12 - 3/12 = 2/12 = 1/6
6-18= -12 -12/6= -2 -2x2= -4 answer= -4