4.用竖式计算:(有★的验算)
46×38= | ★65×80= | 78×65= |
256÷7= | ★406÷4= | 680÷5= |
3.直接写出得数:
0 165012 165020 165026 165030 165036 165038 165042 165048 165050 165056 165062 165066 165068 165072 165078 165080 165086 165090 165092 165096 165098 165102 165104 165106 165107 165108 165110 165111 165112 165114 165116 165120 165122 165126 165128 165132 165138 165140 165146 165150 165152 165156 165162 165168 165170 165176 165180 165182 165188 165192 165198 165206 199269
42×30= | 140×0= | 90÷3= | 89-76= |
25×40= | 20×17= | 630÷3= | 37+68= |
640÷2= | 30×23= | 0÷9= | 480÷8= |
60×50= | 128+182= | 48÷3= | 453÷5≈ |
58×69≈ | 195÷6≈ | 92×12≈ | 378-252≈ |