| 小小神算手。(简算) | ||||
|
| (1)3.75×99+3.75 =3.75×(99+1) =3.75×100 =375 | (2)62×100.1 =62×(100+0.1) =62×100+62×0.1 =6200+6.2 =6206.2 |
| (3)2.5×36 =2.5×4×9 =10×9 =90 | (4)1.25×39×8 =1.25×8×39 =10×39 =390 |
编辑:chaxungu时间:2026-04-27 13:34:02分类:小学数学题库
| 小小神算手。(简算) | ||||
|
| (1)3.75×99+3.75 =3.75×(99+1) =3.75×100 =375 | (2)62×100.1 =62×(100+0.1) =62×100+62×0.1 =6200+6.2 =6206.2 |
| (3)2.5×36 =2.5×4×9 =10×9 =90 | (4)1.25×39×8 =1.25×8×39 =10×39 =390 |