60克=千克 2 吨20千克=吨 1.2时=分
6.13×840.84×613 7.25+0.57.3 0.9×4.084.08
1-0.24= 0.8×0.5= 2.02×5= 5.7+5.3=
400×0.09= 3.8+4.2= 10-5.3= 0.75×1=
2.5-2= 3.14÷10= 7.2-1.9= 0.3×5÷0.3×5=