0.850.805 0.13+6.156.38 630÷18÷5630÷(18×5)
3.2483.2 5.2-4.710.51 72×100+172×101
6.2+1.8= 0.36+0.54= 3.6+0.4=
2.8-2.3= 1.3-0.6= 0.57-0.5=
6.4-3.2= 1.29-0.29= 0.74+0.26=