| 12.5×32×0.8 |
| 2.5×[(3.2+1.8)÷0.25] | 6.4×0.09+0.01×6.4. |
=(12.5×8)×(4×0.8),
=100×3.2,
=320;
②
| 4 |
| 9 |
| 3 |
| 10 |
| 1 |
| 3 |
=
| 40 |
| 90 |
| 27 |
| 90 |
| 30 |
| 90 |
=
| 43 |
| 90 |
③2.5×[(3.2+1.8)÷0.25],
=2.5×[5÷0.25],
=2.5×20,
=50;
④6.4×0.09+0.01×6.4
=6.4×(0.09+0.01),
=6.4×0.1,
=0.64.
编辑:chaxungu时间:2026-04-27 13:18:13分类:小学数学题库
| 12.5×32×0.8 |
| 2.5×[(3.2+1.8)÷0.25] | 6.4×0.09+0.01×6.4. |
| 4 |
| 9 |
| 3 |
| 10 |
| 1 |
| 3 |
| 40 |
| 90 |
| 27 |
| 90 |
| 30 |
| 90 |
| 43 |
| 90 |