6米8厘米=米 1.45吨=千克
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=
①11.6+0.5-7.6
②14.25+3.72+5.75+6.28
③0.25×13×4
④15.83-(5.83+1.2)
⑤12.34-2.81-6.19
⑥17.9-12.4-2.4
0.2,0.6,0.4,0.8,0.6,1,0.8,,,1.4,1.2。