1.9x5/81=5/9
2.7x3/32=21/32
3.45x7/54=35/6
4.21x6/35=18/5
5.51x3/17=9
6.37x2/16=74/16
7.14x3/28-1/2=1
8.12x7/36-2=1/3
9.23x2/16-1/8=11/4
10.21x2/9-5/12=17/4
11.9 × 5/6 + 5/6 =25/3
12.3 × 2/9 + 1/3 =1
13.101 × 1/5 – 1/5 × 21 =16
14.45 × 2/3 + 1/3 × 15 =35
15.5/9 × 18 – 14 × 2/7 =6
16.8 × 4/5 + 8 × 11/5 =24
17.7 × 5/49 + 3/14 =13/14
18.8× 5/4 + 1/4 =41/4
19.12× 5/6 – 2/3 ×9=4
20.12x5/18-14x2/21=2