Question

4.9乘99加4.9简便运算

Answer 1

=4.9×99+4.9×1
=4.9×（99+1）
=4.9×100
=490

Answer 2

4.9*99+4.9*1=4.9*100=490

Answer 3

 

Answer 4

＝4.9*（99+1）

追答

＝4.9*100

＝490

Answer 5

490，求采纳