3/7 + 49/9 - 4/3
8/9 +15/36 + 1/27
12+ 5/6 – 2/9 +3
8— 5/4 + 1/4
6-3/8 – 3/8
4/7 + 5/9 + 3/7 + 5/9
5/2 -( 3/2 + 4/5 )
7/8 + ( 1/8 + 1/9 )
9+ 5/6 + 5/6
3/4 + 8/9 - 1/3
7 +5/49 + 3/14
6 +( 1/2 + 2/3 )
8 + 4/5 + 8 + 11/5
31 + 5/6 – 5/6
9/7 - ( 2/7 – 10/21 )
5/9 + 3/7 + 49/9 - 4/3
4/5 + 25/16 + 2/3 + 3/4
14 + 8/7 – 5/6 + 12/15
17/32 – 3/4 + 9/24
3 + 2/9 + 1/3
5/7 + 3/25 + 3/7
3/14 + 2/3 + 1/6
1/5 + 2/3 + 5/6
9/22 + 1/11 — 1/2
5/3 + 11/5 + 4/3
45 + 2/3 + 1/3 + 15
7/19 + 12/19 + 5/6
1/4 + 3/4 - 2/3
8/7 + 21/16 + 1/2
1/5 – 1/5 + 21
6.9+4.8+3.1 0.456+6.22+3.78 15.89+(6.75-5.8)*6
4.02+5.4+0.98 5.17-1.8-3.2 13.75-(3.75+6.48)*6
3.68+7.56-2.68 7.85+2.34-0.85+4.66 35.6-1.8-15.6-7.2
3.82+2.9+0.18+9.1 9.6+4.8-3.6 7.14-0.53-2.47
5.27+2.86-0.66+1.63 13.35-4.68+2.65 73.8-1.64-13.8-5.36
47.8-7.45+8.8 0.398+0.36+3.64 15.75+3.59-0.59+14.25
7/10 + 1/10 = 8/10 = 4/5
5/9 + 4/9 = 9/9 = 1
8/15 + 3/15 = 11/15
9/14 + 3/14 = 12/14 = 6/7
3/5 + 8/5 = 11/5
4/15 - 3/15 = 1/15
7/8 - 5/8 = 2/8 = 1/4
5/3 - 2/3 = 3/3 =1
7/8 - 4/8 = 3/8
1314/2010- 520/2010 = 794/2010 = 397/1005
1/2+3/4-3/10
2/9+5/6+1/3
4/5-3/10+2/3
1-3/4+3/8
5/6-1/3+3/10
1/2+1/4+1/6
2/3+4/7-3/10
1/4-2/9+4/5
5/3+7/6+1/3
1/2-1/3+4/9
4/5-1/4+1/5
5/16+(4/5-5/16)
4/9-(4/9-2/3)
7/12+5/8+5/12+3/8
7/10-1/4+3/10+3/4
19/10-1/3
5/7-1/4
1/24+3/8
2/3+1/4
1/2+6/8
1/3-1/15
7/6+3/9
5/8+1/3
3/4-1/7
1/5+1/8
5/6-7/9
3/4+1/5=4/5 3/4-1/5=11/20 5/6+2/9=19/18 5/6-2/9=11/18 2/3+3/5=19/15
2/3-3/5=1/15 6/7+1/2=19/14 6/7-1/2=5/14 2/3+1/6=5/6 1/3+1/4=7/12
1/3-1/4=1/12 1/5+1/7=12/35 1/5-1/7=2/35 1/4+1/9=13/36 1/4-1/9=5/36
1/8+1/9=17/72 1/8-1/9=1/72 1/10+7/9=79/90 5/7-1/6=23/42 1-5/9=4/9
1/5+3/8=23/40 3/4+1/5=19/20 2/3-3/5=1/5 1-2/5=3/5 5/8-1/9=37/72
1/10-1/20=1/20 1/6+3/8=13/24 5/9-1/2=1/18 2/3+1/4=11/12 1/2+1/3=5/6
5/6+1/18=8/9 3/5-1/3=4/15 17/15-1/3=4/5 11/12-2/3=1/4 1/2-1/4=1/4
1/7-1/8=1/56 1/3-1/9=2/9 5/6-1/2=1/3 1-2/3=1/3 5/8-1/6=11/24
1/3+1/6=1/2 3/4-1/2=1/4 1/5+1/8=13/40 5/6+4/9=23/18 5/9-2/5=7/45
3/7+5/2=41/14 5/8+9/10=61/40 11/12-8/15=23/60 1/4+1/6=5/12 1/4-1/6=1/12
1-6/7=1/7 11/12-2/3=1/4 3/10+2/5=7/10 7/8-1/4=5/8 3/4+5/12=7/6
3/5-3/7=6/35 5/4-5/12=5/6 1/5-1/9=4/45 1/3-1/8=5/24 11/6-2/9=29/18
1/5+1/9=14/45 1-2/5=3/5 7/4+1/7=53/28 1-1/9=8/9 2/3-2/7=8/21
5/6+1/2=4/3 4/3-3/4=7/12 1-4/7=3/7 4/3+3/2=17/6 5/9+18/5=5/6
3/8+7/10+5/8=17/10 7/8-(1/8+3/4)=0 4/7+1/6-4/7=1/6
2-7/9-2/9=1 3/5+7/8+2/5=15/8 7/9-(1/9+1/3)=1/3
1/4+(2/5+3/4)=7/5 5/6-3/10+1/6-7/10=0 3/4+1/6-2/3=1/4
7/8-1/4+4/9=77/72 1-1/3+2/7=20/21 1/2+4/5-3/10=1
5/6-(2/3-1/9)=5/18 9/10-(3/4+1/8)=1/40 1/2+2/3-3/4=5/12
7/8-1/6+1/4=23/24 1-(3/4-2/9)=17/36 9/10-1/5-1/2=1/5
1/4+3/7+1/2=33/28 7/8-(2/3+1/6)=1/24 1-(1/3+3/5)=1/15
1/2+1/4+1/3=13/12 7/8+1/4+1/2=5/8 5/7-(4/7+1/9)=2/63
1-1/4-1/2=1/4 3/4-1/6-1/3=1/4 3/10+1/4+2/5=19/20
2/3+1/6+1/12=11/12 1-1/4-2/5=7/20 1/2+1/9+1/12=25/36
(注:/ 前面的为分子,后面的为分子,如2/3是三分之二)
五年级第四单元《分数加减法》练习题
1、填一填
(1)分母是12的最简真分数有( )个,他们的和是( )。
(2)一根铁丝长45 米,比另一根短14 米,两根铁丝共( )米。
(3)一根铁丝长45 米,另一根比它短17 米,另一根长( )米。
(4)异分母分数相加减,要先( ),化成( ),再加减。
(5)一批化肥,第一天运走它的13 ,第二天运走它的25 ,还剩这批化肥的( )没有运。
(6)把下面的分数和小数互化。
0.75=( ) 25 =( ) 3.42=( )
58 =( ) 2.12=( ) 414 =( )
2、计算题
512 +34 +112 710 -38 -18 415 +56
12 -(34 -38 ) 56 -(13 +310 ) 23 +56
3、解方程
17 +x=23 45 -x=14 x-16 =38
5、解决问题
(1)有一块布料,做上衣用去78 米,做裤子用去34 米,还剩112 米,这些布料一共用去多少米?
(2)某工程队修一条路,第一周修了49 千米,第二周修了29 千米,第三周修的比前两周的总和少16 千米,第三周修了多少?
(3)课堂上学生做实验用15 小时,老师讲解用310 小时,其余的时间学生独立做作业。已知每堂课是23 小时,学生做作业用了多少时间?
2/1+3/2=