4.4+5= 0.44+0.16= 0.45÷9= 3.2+4.8+0.6=
5-0.5= 20×0.4= 0.5×10= 1.93-0.13-0.87=
0.37×8= 1.06×40=
30.4×25= 0.152×15=
0.2+0.8= 8.8+0.12= 8.8-1.2= 0.38×5= 0.9-0.09=
7.4-0.77= 1.2×5= 1.6-0.4= 0.35+0.55= 0.125×8=
4.9+1.1= 7.5-5= 6-0.07= 1-0.81=
0.2+2.8= 8.4-4= 1.25+0.5= 5.1-0.8=
0.25+0.4= 0.37+0.3= 90×0.6= 0.4×500=
0.4+0.16= 1-0.13= 5.6+7= 8.8-4=
0.5×8= 0.24×4= 0.25×4= 2.34×100=
20×30 0.2×0.3
=(2×10)×(3×10) =(2×0.1)×(3×0.1)
=(2×3)×(10×10) =(2×3)×(0.1×0.1)
=6×100 =6×0.01
=600 =0.06