4x20
80
1.3 + 2.1
3.4
4/7 + 6/7
10/7
9x9
81
2.11 + 3.22
5.33
10x12
120
6.3 x 2.5
2.61
422x550
5/30
.60
500x725
362500
6/30=?
.5