1.3/5+49/10=30+245/50=275/50-1/3=825-50/150=725/150=4 75/150= 4 1/2

2.11/6-7/4=44-42/24=2/24+3/5=10+72/120=82/120=41/60

3.10/8+(12/5-5/2)=10/8+(24-10/10)=10/8+14/10=100+112/80=212/80=53/20=2 13/20

4.6/5:(1/6×7/5)=/5:7/30=6/5×30/7=180/35=3 1/7

5.5/8×(1/7:3/2):5/8×(1/7×2/3)=5/8×2/21=10/168

6.8/5×4/3=32/15:15/7=32/15×7/15=224/225

7.11/2×3/5=33/10+21/5=165+210/50=375/50=7 25/50=7 1/2

8.(100/28-21/7)=700-588/196=1288/196×7/2=9016/272= 33 232/272= 33 29/34

9.5/7:3/4=(5/7×4/7)=20/49+294/42=840+14.406/2058=13246/2058 = 7 840/2056 = 7 105/257

10.7/36+11/9=63+396/324=459/324:20/9=459/324×20/9=9180/1296=7 108/1296= 7 27/324= 7. 1/12