0.24:4=0.06
15.3:5=3.06
12.4:8=1.55
0.15:30=0.005
0.06+3.06=3.12
3.12+1.55=4.67
4.67+0.005=4.675
2)1.24+3.56=4.8
4.8:16=0.3
3)3.72:12=0.31
2.28+0.31=2.59
4) 11.7-3.7=8
2.4:8=0.3
3.6+0.3=3.9
