用简便方法计算3⼀4-(1⼀2-1⼀4) 7⼀16+9⼀20-5⼀16+11⼀20

暑假作业上的,急!!!
2024-11-17 12:32:05
推荐回答(1个)
回答1:

3/4-(1/2-1/4)
=3/4+1/4-1/2
=1-1/2
=1/2

7/16+9/20-5/16+11/20

=(7/16-5/16)+(9/20+11/20)
=1/8+1
=1又1/8