Question

4.58*47 45.8*5.4简便计算？

Answer 1

4.58×47+45.8×5.4
=4.58×47+4.58×54
=4.58×(47+54)
=4.58×101
=4.58×100+4.58
=458+4.58
=462.58

Answer 2

4.58×47+45.8×5.4简便计算
=4.58×(47+54)
=4.58×100+4.58
=458+4.58
=462.58

Answer 3

先变形再利用乘法分配律可以使计算简便。
4.58x47+45.8x5.4
=45.8x4.7+45.8x5.4
=45.8x（4.7+5.4）
=45.8x10.1
=45.8x（10+0.1）
=45.8x10+45.8x0.1
=458+4.58
=462.58

Answer 4

解；4.58x（47十5.4x10）
二4.58x101
＝4.58x（100十1）
二4.58x100十4.58x丨
＝458十4.58
＝462.58

Answer 5

4.58x47+45.8x5.4
=4.58x47+4.58x54
=4.58x（47+54）
=4.58x101
=4.58x100+4.58ⅹ1
=458+4.58
=462.58