39.8X9.9+3.98简便计算

39.8X9.9+3.98简便计算
2024-11-01 13:22:36
有3个网友回答
网友(1):

39.8X9.9+3.98简便计算
=39.8×(9.9+0.1)
=39.8×10
=398

网友(2):


参考

网友(3):

=3.98×99+3.98
=3.98x(99+1)
=3.98x100
=398