直接写得数.36÷0.6= 1.6÷0.8= 0.15÷0.5= 3.9÷3.9=1.8×0.5= 9.3÷0.31= 1.8÷0.02= 0.25×4=0÷4.7= 10.6÷10= 4.2﹣1.4= 0.24÷0.6=
计算并验算. 7.89+1.56=验算: 10.2﹣6.45=验算:
4.58+16.2= 34.22﹣16.8= 78.8﹣64.35=
计算下面各题并且验算. 6.94+1.78 15.13﹣13.6.
7.28﹣3.33+1.67=7.28﹣5=2.28 .
用竖式计算并验算. ①6.14﹣2.56=②2790÷31=