<span> 2/3-1/8=16-3/24=13/24
</span><span>17/42-6/21=17-12/42=5/42</span>
1)15*0.6=9
2)36/4 : 1/4=36/4 * 4/1=36
3)38-36=2
12 1/4-3 5/6+5 7/8=14 7/24
1) 12 1/4-3 5/6=12 3/12-3 10/12= 8 5/12
2) 8 5/12+5 7/8=8 10/24+5 21/24=14 7/24
3.2x-1.2x=-2.7-4.9
2x=-7.6
x=-3.8