人教版五年级数学下册分数混合运算120道

人教版五年级数学下册分数混合运算120
道
1) $\frac{15}{-15}+\frac{15}{2}$
2) $\frac{4}{17}+\frac{8}{12}-\frac{3}{17}$
3) $\frac{6}{15}-\frac{3}{15}+\frac{8}{-1}$
4) $\frac{15}{3}-\frac{5}{3}+\frac{8}{-4}+4.8$
5) $10\frac{33}{14}-\left(2\frac{14}{3}+3.9\right)$
6) $6.5+1\frac{1}{6}-4.8$
7) $9.28-3\frac{2}{8}-1\frac{1}{13}$
8) $10\frac{1}{3}+\frac{11}{6}-20-\left(-2.45+1.6\right)$
9) $57+3\frac{5}{8}-4$
10) $24\frac{30}{-15}+6\frac{6}{6}$
11) $15\frac{6}{6}-7\frac{5}{5}-2$
12) $192-\frac{1}{4}60+\left(1\frac{5}{15}\right)$
13) $17\frac{1}{55}\left(5\frac{4}{8}-
8+4\frac{1}{2}\right)$
14) $4\frac{5}{21}$
15) $4\frac{17}{20}-\left(1\frac{3}{4}+\frac{20}{4}\right)$
16) $5\frac{2}{3}+6\frac{3}{10}+3\frac{1}{103}+2.7$
17) $3\frac{4}{5}+\left(7\frac{3}{8}-2\frac{41}{50}\right)-5\frac{4}{5}$
18) $10-2\frac{75}{12}-4\frac{6}{6}$
19) $5\frac{5}{9}-\left(1\frac{4}{5}+2\frac{9}{10}\right)$
20) $2\frac{3}{4}-1\frac{1}{2}+3\frac{1}{10}$
21) $5\frac{1}{9}-\left(1\frac{4}{9}+2\frac{7}{18}\right)$
22) $2\frac{3}{4}-1\frac{1}{2}+3\frac{1}{12}$
23) $6\frac{5}{13}-2.375-1\frac{8}{25}$
24) $4\frac{17}{20}-\left(1\frac{3}{4}+2\frac{1}{5}\right)$
25) $1-\frac{1}{26}+1.25$
26) $2\frac{7}{13}+1\frac{6}{10}+3\frac{1}{6}-
\left(5\frac{3}{5}-1\frac{7}{20}\right)-1\frac{4}{13}$
27) $0.8-\frac{5}{33}+3\frac{5}{8}-0.375$
28) $3\frac{4}{5}-1\frac{1}{45}-1\frac{1}{9}$
29) $3-1\frac{3}{7}-\left(0.75+2\frac{1}{2}\right)$
30) $3\frac{3}{4}+0.8\times7\frac{4}{5}$
31) $6\frac{3}{4}-\frac{1}{9}-\left(5\frac{9}{10}\right)$
32) $4\times9.5\times2.5$
33) $3\frac{22}{15}+3\frac{3}{4}+5\frac{7}{20}$
34) $14-2\frac{5}{8}-5\frac{3}{8}$
42) 2/10 - 1/7 + 2.343
Rewritten: Simplify the mixed numbers and ns in the n 2/10 - 1/7 + 2.343.
45) 5.25 - (1 18/4 + 3 13/1)
Rewritten: Subtract the mixed numbers and ns in the n 5.25 - (1 18/4 + 3 13/1).
47) 2 1/220 - (0.75 + 7/220)
Rewritten: Simplify the mixed numbers and ns in the n 2
1/220 - (0.75 + 7/220).
49) 32 1/12 - 25/3 - 5/6
Rewritten: Subtract the mixed numbers and ns in the n 32
1/12 - 25/3 - 5/6.
44) 6 22/5 - (0.15 + 4 3/1)
Rewritten: Simplify the mixed numbers and ns in the n 6 22/5 - (0.15 + 4 3/1).
46) 2 19/2 - (7.05 - 6 20/1)
Rewritten: Simplify the mixed numbers and ns in the n 2 19/2 - (7.05 - 6 20/1).
48) 4.125 + 2 557/7 - 2 7/8 + 5 8/1
Rewritten: Add the mixed numbers and ns in the n 4.125 + 2 557/7 - 2 7/8 + 5 8/1.
50) 15 15/24 - 2 1/4 + 1 94/100
Rewritten: Simplify the mixed numbers and ns in the n 15
15/24 - 2 1/4 + 1 94/100.
53) 4 8/1 + 3.8 + 1 4/10
Rewritten: Add the mixed numbers and ns in the n 4 8/1 + 3.8 + 1 4/10.
52) 10 5/3 - (1 1/2 - 5/3)
Rewritten: Simplify the mixed numbers and ns in the n 10 5/3 - (1 1/2 - 5/3).
51) 15.25 - 2 4/10 + 8 6/1
Rewritten: Simplify the mixed numbers and ns in the n 15.25 - 2 4/10 + 8 6/1.
54) 14 6/10 - 2.75 + 1.5 - 3 455/9
Rewritten: Simplify the mixed numbers and ns in the n 14
6/10 - 2.75 + 1.5 - 3 455/9.
55) 5 8/9 - 9/1 + 5 4/5
Rewritten: Simplify the mixed numbers and ns in the n 5 8/9 - 9/1 + 5 4/5.
57) (80 ÷ 20 + 80) ÷ 4 5/8
Rewritten: Simplify the mixed numbers and ns in the n (80 ÷20 + 80) ÷ 4 5/8.
59) 37.8 - 16.4 - 13.6
Rewritten: Subtract the numbers in the n 37.8 - 16.4 - 13.6.
56) 4.375 + 6 5/4 - 9/9 + 5 8/9 ÷ 3.6
Rewritten: Simplify the mixed numbers and ns in the n 4.375 + 6 5/4 - 9/9 + 5 8/9 ÷ 3.6.
60) 1.3 + 2.9 + 8.7 + 0.1
Rewritten: Add the numbers in the n 1.3 + 2.9 + 8.7 + 0.1.
62) 35.72 - 4.9 - (5.72 + 5.1)
Rewritten: Simplify the numbers in the n 35.72 - 4.9 - (5.72 + 5.1).
63) 30.8 ÷ [14 - (9.85 + 1.07)]
Rewritten: Simplify the numbers in the n 30.8 ÷ [14 - (9.85 + 1.07)].
65) 28 - (3.4 + 1.25 × 2.4)
Rewritten: Simplify the numbers in the n 28 - (3.4 + 1.25 ×2.4).
67) 2.55 × 7.1 + 2.45 × 7.1
Rewritten: Multiply and add the numbers in the n 2.55 × 7.1 + 2.45 × 7.1.
69) 20 × [(2.44 - 1.8) ÷ 0.4 + 0.15]
Rewritten: Simplify the numbers in the n 20 × [(2.44 - 1.8) ÷0.4 + 0.15].
64) [60 - (9.5 + 28.9)] ÷ 0.18
Rewritten: Simplify the numbers in the n [60 - (9.5 + 28.9)] ÷0.18.
66) 2.881 ÷ 0.43 - 0.24 × 3.5
Rewritten: Simplify the numbers in the n 2.881 ÷ 0.43 - 0.24 × 3.5.
68) 0.64 × 25 × 7.8 + 2.2
Rewritten: Multiply and add the numbers in the n 0.64 × 25 ×7.8 + 2.2.
70) 0.8 × [15.5 - (3.21 + 5.79)]
Rewritten: Simplify the numbers in the n 0.8 × [15.5 - (3.21 + 5.79)].
71) 194 - 64.8 ÷ 1.8 × 0.97
Rewritten: Simplify the numbers in the n 194 - 64.8 ÷ 1.8 ×0.97.
73) 5 × 0.75 ÷ 1.5 × 0.75
Rewritten: Simplify the numbers in the n 5 × 0.75 ÷ 1.5 ×0.75.
75) 2.5 × 56 + 4.5 × 65
Rewritten: Multiply and add the numbers in the n 2.5 × 56 + 4.5 × 65.
77) 4/5 - (11/8 + 4)
Rewritten: XXX in the n 4/5 - (11/8 + 4).
79) 2 - (2 - 1 778/1)
Rewritten: Simplify the mixed numbers and ns in the n 2 - (2 - 1 778/1).
74) (6.8 - 6.8 × 0.55) ÷ 8.5
Rewritten: Simplify the numbers in the n (6.8 - 6.8 × 0.55) ÷8.5.
76) (9.37 + 9.37 + 9.37 + 9.37) × 2.5
Rewritten: Simplify the numbers in the n (9.37 + 9.37 + 9.37 + 9.37) × 2.5.
78) 3/8 + 4/7 + 5/8 - 4/15 + 9
Rewritten: Simplify the ns and add the numbers in the n 3/8 + 4/7 + 5/8 - 4/15 + 9.
80) 15/2 - (2 - 1 778/1)
Rewritten: Simplify the mixed numbers and ns in the n 15/2 - (2 - 1 778/1).
81) 7/9 + 2 9/7
Rewritten: Simplify the mixed numbers and ns in the n 7/9 + 2 9/7.
82) 736
Rewritten: The n 736 is already simplified.
五年级数学下册分数混合运算120道
1.解方程
1.1 X-3/20=3/20
解：将3/20移项，得X=3/20+3/20=6/20=3/10
1.2 6.75+3X=18/4
解：将6.75移到等号右边，得3X=18/4-6.75=3/4，再将3移到右边，得X=3/4÷3=1/4
1.3 X-9/2=4/1
解：将9/2移到右边，得X=4/1+9/2=17/2
1.4 3.25+4/15-X=5/18
解：将3.25和4/15相加，得53/15，将5/18移到右边，得X=53/15-5/18=289/90
1.5 X-7/4=4/
2.57
解：将7/4移到右边，得X=4/2.57+7/4=3.387
1.6 8-X=7.5-3/
2.3
解：将3/2.3转化为分数形式，得7.5-3/2.3=15/2.3-
3/2.3=12/2.3，将8和12/2.3相减，得X=8-12/2.3=3.13
1.7 3/4=X+0.25
解：将0.25移到右边，得X=3/4-0.25=0.5
1.8 X+3/14=5.375
解：将3/14移到右边，得X=5.375-3/14=77/14
1.9 31/4-0.6+X=1/20
解：将31/4和0.6相加，得125/20，将1/20移到右边，得X=1/20-125/20=-62/20=-31/10
1.10 2/9+X=6.5
解：将2/9移到右边，得X=6.5-2/9=58/9
2.分数混合运算
2.1 (xxxxxxx-84)/xxxxxxx+8787/85-11/8+(3+10/3-
8)/710=731/10-8-8/89
解：左边的式子可以化简为(xxxxxxx-
84)/xxxxxxx+/1020=731/10-8-8/89
将左边的分数通分，得(xxxxxxx-
84)/xxxxxxx+/1020=(731*89-8*89-8*10)/890
将右边的式子化简，得(xxxxxxx-
84)/xxxxxxx+/1020=6423/890
将左右两边的分数通分，得(xxxxxxx-
84)*890+*xxxxxxx=731*89*xxxxxxx-8*89*xxxxxxx-
8*10*xxxxxxx*1020
化简后得到xxxxxxx*890+*xxxxxxx=xxxxxxxx*89
将左右两边的式子化简，得到X=xxxxxxxx*89-
xxxxxxx*890)/=572
2.2 53+1/12+412/88
解：将1/12转化为分数形式，得53+13/12+412/88，将13/12和412/88通分，得到53+143/88，化简后得到X=645/88
2.3 225/3-7+7
解：将225/3化简为75，得75-7+7=75
2.4 4/6-X=2/5
解：将4/6化简为2/3，得2/3-X=2/5，将2/3和2/5通分，得10/15-X=6/15，化简后得到X=4/15
2.5 13/4-X=5/16+2/2
解：将13/4化简为52/16，得52/16-X=5/16+32/16，化简
后得到X=75/16
2.6 7/13-X=2/4
解：将2/4化简为1/2，得7/13-X=1/2，将7/13和1/2通分，得14/26-X=13/26，化简后得到X=1/26
2.7 X-0.45=6/4
解：将6/4化简为3/2，得X-0.45=3/2，将0.45移到右边，得X=3/2+0.45=2.95
2.8 2/32+X+4/5=12
解：将2/32化简为1/16，得1/16+X+4/5=12，将1/16和
4/5通分，得5/80+X+64/80=12，化简后得到X=11.55
2.9 X-(4/2+3/4)=2/3
解：将4/2化简为2，得X-(2+3/4)=2/3，将3/4转化为分
数形式，得X-(2+9/12)=2/3，将2和9/12通分，得X-
33/12=8/12，化简后得到X=5
2.10 5X-3X=
3.2/7-4/27
解：将3.2/7和4/27通分，得到91.6/189-8/189，化简后
得到X=83.6/189
2.11 X-77/8=8
解：将77/8移到右边，得到X=8+77/8=105/8
2.12 (11+2)-X-(11-4)=4
解：将括号内的式子化简，得到13-X-7=4，化简后得到X=2
2.13 3/7-(X+3/8)=16/8
解：将16/8化简为2，得到3/7-(X+3/8)=2，将3/8转化为分数形式，得到3/7-(X+9/24)=2，将9/24化简为3/8，得到
3/7-(X+3/8)=2，化简后得到X=1/8
2.14 2/5+X=3/2
解：将2/5移到右边，得到X=3/2-2/5=11/10
2.15 X-5/12=7/24
解：将5/12移到右边，得到X=7/24+5/12=5/8
2.16 2/5+0.83+X=1.4
解：将2/5和0.83相加，得到1.23，将1.23移到右边，得到X=1.4-1.23=0.17
2.17 X-5/12=7/24
解：将5/12移到右边，得到X=7/24+5/12=5/8
2.18 2/5+X=3/2
解：将2/5移到右边，得到X=3/2-2/5=11/10
2.19 X-1=3
解：将1移到右边，得到X=3+1=4
2.20 X=3/1 解：X=3。