4 1/6+1.25=4 1/6+1 1/4=
=25/6+5/4=50/12+15/12=65/12
3.5-1 1/3=3 1/2-1 1/3=
=7/2-4/3=21/6-8/6=13/6
65/12÷13/6=65/12×6/13=5/2
2.6-1 2/3=2 3/5-1 2/3=13/5-5/3=
=39/15-25/15=14/15
0.2+1/30=1/5+1/30=6/30+1/30=
=7/30
14/15÷7/30=14/15×30/7=4
5/2×4×3.2=5/2×4×3 1/5=
=5/2×4×16/5=32
7/12-0.375=7/12-3/8=14/24-9/24=
=5/24
0.85÷5/24=17/20×24/5=102/25
102/25-0.08=102/25-2/25=
=100/25=4
32÷4=8