题目内容
小小神算手。(简算) | ||||
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(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 |
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题目内容
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 |