苏教版五年级下册数学课本第118页整理与练习答案
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14： 6/5 1/2 1 0 3/10 5/8
15： 2/3+3/4 =8/12+9/12 = 17/12
3/8--1/6 =9/24--4/24 =5/24
3/10+3/5 =3/10+6/10 =9/10
1/5--1/8 =8/40--5/40 =3/40
5/6--1/4 =10/12--3/12 =7/12
4/5+3/4 =16/20+15/20 =31/20
5/6--2/3 =5/6--4/6 =1/6
1/2+5/8 =4/8+5/8 =9/8
16： 2/5--1/6+2/3 =12/30--5/30+20/30 =9/10
4/9+3/4+5/9 =4/9+5/9+3/4 =1+3/4 3 =1---- 4
1--1/4+2/5 =1-- 5/20+8/20 =23/20 7/8+2/7+1/8 =7/8+1/8+2/7 2 = 1 ----- 7
1/2+5/6--1/3 =3/6+5/6--2/6 =1
8/9--5/9+1/6 =2/6+1/6 =1/2
17： 1/3+1/6 =2/6+1/6 =1/2
18： 1/4+1/10+1/8 =10/40+5/40+5/40 =19/40
19： 1--1/5--3/10 =1--2/10--3/10 =1/2
20： 4/5+3/4--3/10 =16/20+15/20--6/20 =5/4 |
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