列竖式计算：
①42×235 ②116×28 ③240×35 ④106×40
⑤816÷51 ⑥665÷25 ⑦243÷27 ⑧401÷79．
用竖式计算．
5.9+28.65﹣16.57= 4.68×0.72= 87.4÷0.38=
5.43+1.47= 5﹣3.28= 0.46÷4.6= 4×0.25=
3÷0.3= 4.5×0.4= 0.63÷0.7= 1.8×0.4=
9.58×101﹣9.58= 85÷（1﹣0.9）=
直接写出得数
5.43+1.47= 5﹣3.28= 0.46÷4.6= 4×0.25= 3÷0.3=
4.5×0.4= 0.63÷0.7= 1.8×0.4= 9.58×101﹣9.58= 85÷（1﹣0.9）=
口算
5﹣2.8= 4×0.25= 0.46÷4.6= 5.8+4.6=
0.32×0.2= 32.1×0.3= 7.5﹣0.3= 3.2÷0.08=
直接写得数
6.2﹣3= 2.7+1.8= 0.25×4= 3.6÷6=
0.36+0.14= 4﹣0.8= 8.4÷4= 9÷0.01=