39.8X9.9+3.98简便计算

39.8X9.9+3.98简便计算
2024-11-01 13:22:36
推荐回答(3个)
回答1:

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

回答2:


参考

回答3:

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