5.竖式计算.
| 24×69= | 190×70= | 150÷26= |
| 3276÷84= | 108×3= | 19200÷2400= |
4.直接写得数.
0 137956 137964 137970 137974 137980 137982 137986 137992 137994 138000 138006 138010 138012 138016 138022 138024 138030 138034 138036 138040 138042 138046 138048 138050 138051 138052 138054 138055 138056 138058 138060 138064 138066 138070 138072 138076 138082 138084 138090 138094 138096 138100 138106 138112 138114 138120 138124 138126 138132 138136 138142 138150 199269
| 12×4= | 52÷13= | 900÷30= | 950+50= |
| 12×50×0= | 66÷22= | 15×20= | 8100÷900= |
| 119×41≈ | 632÷91≈ |