99.9+999.9+9999.9怎么用简便运算

2024-11-22 21:18:22
推荐回答(3个)
回答1:

99.9+999.9+9999.9
=100-0.1+1000-0.1+10000-0.1
=11100-0.3
=11099.7
供参考

回答2:

99.9+999.9+9999.9
=100+1000+10000-0.1*3
=11100-0.3
=11099.7

回答3:

100-0.1+1000-0.1+10000-0.1=11100-0.3=11099.7