.................=9 1/2
1) 7/9*1 2/7=7/9*9/7=1
2) 43 3/4 : 11 2/3=175/4 * 3/35=15/4=3 3/4
3) 1+3 3/4=4 3/4
4) 4 3/4 - 3 18/25=4 75/100 - 3 72/100=1 3/100
5) 37 1/2:2 1/12=75/2 * 12/25=18
6) 1 3/23 * 9=26/23*9=234/23=10 4/23
7) 18-10 4/23=7 19/23
8) 1 1/45 * 7 19/23=46/45 * 180/23=8
9) 1 3/100+47/100=1 50/100=1 1/2
10) 1 1/2+8=9 1/2