Question

数学应用题（小学水平）（1道）

1 有一项工程计划150天完成，按新的施工方法工作可提前10%的时间完成；如果在适当增加设备，还可提高工作效率20%，照这样干，这项工程用多少天可以完成？

过程要详细，写对有加分哦！！！！！！！

Answer 1

简单：
150乘以 10%=15（天）
所以用新的施工方法就是150-15=135（天）
此时工作效率为1/135（一百三十五分之一）
增加设备后，效率提高1/135乘以（100%+20%）等于2/225
则完成工程要 1除以 2/225=112.5天，如果有说取整数，那就是113天。 乘以符号和除以不会写请原谅
看好了是提高工作效率各个楼层的猪，哈哈！

Answer 2

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在人海中我看见了你
150*(1-10%)=135天

135*（1-20%）=108天

Answer 3

150x(1-10%)=135 （天）
135x(1-20%)=108 （天）
答：这项工程用108天可以完成

Answer 4

150*(1-10%)=135天

135*（1-20%）=108天

Answer 5

150x(1-10%)=135
135x(1-20%)=108

Answer 6

150乘以（1-10%-20%）等于105天

这么简单都不会，小朋友，好好学习啊！

其实你问老师的话也许还会表扬你爱学习呵！