口算:5.7+6.3= 20.05+0.4= 34.6﹣4.9= 9﹣4.2=5.5÷11= 8.2÷100= 5.783×1000= 2.5×4=0.01×8= 12﹣1.2= 4.7×0×0.4= 125×1.7×0.8=
32.8+19= 0.51÷17= 240÷30= 1000×0.8= 3.06+0.2=0.67+1.24= 8×125= 7﹣6.28= 8.2﹣0.01= 99×23=50×4= 5÷1000= 0.42+9.5= 65×25×4= 0.08÷100=10×0.5= 1.82﹣0.63= 4.5+1.5= 1﹣0.63= 231﹣99=
用竖式计算.4.25+9.39= 20﹣9.09=0.756÷0.18= 86.75×0.26=6.9÷0.54=(得数保留两位小数) 2.7÷11=(商用循环小数表示)
直接写得数0.4+0.06= 8.6﹣7= 1+0.45=7×0.9= 0.78×0.1= 32.1×0.2=1.8﹣0.5= 3.2÷32= 0.36÷0.09=4.3﹣2.3= 9.6÷0.3= 3.2+4.7=2÷0.5= 0.1×0.1= 21÷0.3=2.8+8=
直接写得数.10﹣0.5= 2.37+0.33+0.7= 0.1×0.01=3.26÷0.01= 0.75÷25= 9.1÷13=1.25×1.3×8= 0.1+0.2+0.3+0.4+…+0.8+0.9=