用竖式计算。(1)208×7(2)280×7
看谁算的又对又快.3.4+0.34= 0.12+13= 56﹣2.3= 20000﹣511= 7.12+16= 1.3+38=
用竖式计算,带*的验算.42.6+13.48=*10﹣0.42=6.57﹣1.83=*62.37+8.09=
用竖式计算(前面带星号的要验算)7.02﹣4.36 14.53+5.67 ★6.47+0.58.
列竖式计算:①42.8+8.39 ②60﹣45.18.
用竖式计算.41﹣28.3= 25×14= 35×45= 29×47=