13/100+17/100-11/100=(13+17-11)/100=19/100
8/9-5/9+2/3=(8-5+2×3)/9=9/9=1
2/51+1/3+3/17=(2+1×17+3×3)/51=28/51
9+1 1/4-2/5=45/5+5/4-2/5=(45×4+5×5-2×4)/20=197/20=9 17/20
6 3/5-2 1/55=33/5-111/55=(33×11-111×1)/55=252/55=4 32/55
4-2 7/12=48/4-31/12=(48×3-31)/12=113/12=9 5/12
16-5/7=112/7-5/7=(112-5)/7=107/7=15 2/7
4 3/5-2 2/7=23/5-16/7=(23×7+16×5)/35=(161+80)/35=241/35=6 31/35
2 3/14-1 1/7=31/14-8/7=(31-8×2)/14=15/14=1 1/14
7/10-2/5=(7-2×2)/10=3/10
12 3/16+3 4/48=195/16+148/48=(195×3+148)/48=733/48=15 13/48
45-14 7/19=855/19-273/19=(855-273)/9=582/9= 64 6/9= 64 2/3