2/5 - 3/10 = (2×2)/(5×2) - 3/10 = 4/10 - 3/10 = (4-3)/10 = 1/10.
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1 − 5/2 = -11/2
3/5 - 1/10 --> 6/10 - 1/10 = 5/10 = 1/2.
1 and 1 over 3
3 and 2/5 minus 1 and 1/3 = 2 and 1/15
x/2 - 7 = -10 x/2 = -3 x = -3 x 2 x = -6