a)3/5+5/6+2/3-17/15
b)2 1/2+3 1/6+4 3/4-7 11/12
3/5+5/6+2/3-17/15=18/30+25/30+20/30-34/30= 63/30-34/30=29/30
2 1/2+3 1/6+4 3/4-7 11/12= 2 6/12+3 2/12+ 4 9/12-7 11/12= 9 17/12-7 11/12=2 6/12=2 1/2
a)3/5+5/6+2/3-17/15= 18/30+25/30+20/30-34/30=29/30
b)2 1/2+3 1/6+4 3/4-7 11/12=30/12+34/12+57/12-95/12=26/12
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3/5+5/6+2/3-17/15=18/30+25/30+20/30-34/30= 63/30-34/30=29/30
2 1/2+3 1/6+4 3/4-7 11/12= 2 6/12+3 2/12+ 4 9/12-7 11/12= 9 17/12-7 11/12=2 6/12=2 1/2
a)3/5+5/6+2/3-17/15= 18/30+25/30+20/30-34/30=29/30
b)2 1/2+3 1/6+4 3/4-7 11/12=30/12+34/12+57/12-95/12=26/12