人教版六年级上分数乘除法计算题专项练习

习

1. ÷ 57 × 7 × 3 ÷ 4 = 105 2. 9 ÷ 97 = 0.0928 3. 5 ÷ 15 = 0.3333 4. 729 × 3 ÷ 4 = 6.75 5. 19 × 15 ÷ 38 = 7.5 6. 41 × 7 = 287 7. 8 × 77 ÷ 8 = 77 8. 63 ÷ 9 = 7 9. 3 ÷ 4 = 0.75 10. 0 × 8 = 0

11. 12 ÷ 3 = 4 12. 5 ÷ 6 × 9 = 7.5 13. 610 ÷ 5 × 2 = 244 14. 5 ÷ 7 ÷ 7 = 0.102 15. 1210 ÷ 6 ÷ 3 - 3 = 63 16. 5 ÷ 8 × 453 + 8 ÷ 4 = 284.125 17. 1 ÷ 52 × 24 × 3 ÷ 13 × 4 = 0.9231 18. 1 × 3.2 + 5.6 × 0.5 + 1.2 × 50% ÷ 2 = 4.56 19. 53 - (25 ÷ 3 + 3 ÷ 4) ÷ 31 ÷ 4 = 51.25

1. 5 ÷ 8 ÷ 16 = 0.039 2. 7 ÷ 14 ÷ 167 = 0.029 3. 11 ÷ 3 × 8 = 29.3333 4. 524 × 6 ÷ 5 × 43 = 528.32 5. 6 ÷ 5 × 43 = 51.6 6. 12 ÷ 3 × 5 = 20 7. 1 ÷ 5 - 1 ÷ 6 = 0.0333

8. 19 + 53 ÷ 13 × 4 ÷ 5 = 24.8462 9. 3 ÷ 8 × 4 = 1.5

10. 12 ÷ 3 × 4 - 18 ÷ 2 × 3 = -9 11. 5 ÷ 8 × 453 + 8 ÷ 4 = 284.125

12. 1 × 3.2 + 5.6 × 0.5 + 1.2 × 50% ÷ 2 = 4.56 13. 53 - (25 ÷ 3 + 3 ÷ 4) ÷ 31 ÷ 4 = 51.25

1. x = 21 ÷ 7 = 3 2. x = 2 ÷ 15 × 4 = 0.5333

1. 65:131 = 5:10 2. 23:3 = 7.6667:1 3. 49:7 = 7:1

1. (4 × 18) ÷ 13 = 5.5385 2. 15:6 = 62:24.8 3. 6x - 4x = 8, x = 4 4. 12 ÷ 2 + 3 = 9 1.

$\\frac{4}{5}\\div\\frac{46}{5}=\\frac{4}{46}=\\frac{2}{23}$

2. $7\\div6=\\frac{7}{6}$

$\\left(3+\\frac{3}{12}\\right)\imes5=4\imes5=20$

$\\frac{3}{7}\imes\\frac{1}{4}-\\frac{7}{11}\imes\\frac{1}{4}=\\frac{3}{28}-\\frac{7}{44}=\\frac{1}{77}$

$1\\div7+\\frac{6}{7}=\\frac{1+6}{7}=\\frac{7}{7}=1$ $2\\frac{9}{10}\imes\\frac{15}{38}=\\frac{29}{10}\imes\\frac{15}{38}=\\frac{435}{380}=\\frac{87}{76}$

$\\frac{8}{9}\imes\\frac{3}{4}=\\frac{2}{3}$ $\\frac{93}{10}\\div2=\\frac{93}{20}$

$\\frac{511}{8}-12\imes\\frac{11}{7}=\\frac{511}{8}-\\frac{132}{7}=-\\frac{}{56}$

$5\imes\\frac{3}{4}=\\frac{15}{4}$

$\\frac{3}{4}+\\frac{1}{2}\\div\\frac{1215}{2}=\\frac{3}{4}+\\frac{1}{2}\\div\\frac{1215}{2}=\\frac{3}{4}+\\frac{1}{2}\\div\\frac{1215}{2}=\\frac{3}{4}+\\frac{1}{2430}=\\frac{607}{810}$

$5\\div2=\\frac{5}{2}$

1.

$1118+49\\div6+4\\frac{7}{5}\imes\\frac{1}{2}+4\\frac{5}{9}$

$=1118+\\frac{49}{6}+2\\frac{2}{5}+\\frac{41}{9}$ $=1118+\\frac{441+294+1805+246}{}$ $=1118+\\frac{2786}{}$

3. $2\\left(\\frac{5}{6}+\\frac{7}{8}\\right)\imes24-3\imes8+\\frac{1516}{7+10\\div3}\imes5$

$=2\\left(\\frac{20+21}{24}\\right)\imes24-24+\\frac{1516}{7+\\frac{10}{3}}\imes5$

$=2\imes\\frac{41}{24}\imes24-24+\\frac{1516}{\\frac{31}{3}}\imes5$

$=41\imes5-24+\\frac{1516}{\\frac{31}{3}}\imes5$ $=205-24+\\frac{1516\imes3}{31}\imes5$ $=181+\\frac{}{31}$

4.

$25:400.7:9.8=\\frac{25}{400.7\imes9.8}=\\frac{25}{3923.86}\\approx0.$

1. $\\frac{4}{23}-\\frac{1}{5}\\div4=\\frac{4}{23}-\\frac{1}{20}=\\frac{80}{920}-\\frac{23}{920}=\\frac{57}{920}$

2.

$\\frac{18}{5}\\div\\frac{1}{}\imes\\frac{1}{12}=\\frac{18}{5}\imes\\frac{}{1}\imes\\frac{1}{12}=\\frac{18\imes}{5\imes12}=\\frac{24\imes}{5}=\\frac{1536}{5}=307.2$

3. 设这个数为$x$，则$x-\\frac{1}{x}=33$ $x^2-1=33x$ $x^2-33x-1=0$

$x=\\frac{33\\pm\\sqrt{33^2+4}}{2}$ $x=\\frac{33\\pm\\sqrt{1105}}{2}$ 5

，甲数为30，乙数为25，求甲数是乙数的百分之几？

甲数是乙数的$\\frac{30}{25}=1.2$倍，即甲数是乙数的120%。

求$3594$与它的倒数之和，除以$9$与$10$的积，商是多少？

$\\frac{1}{3594}+\\frac{3594}{1}=\\frac{xxxxxxxx}{3594}$，$\\frac{xxxxxxxx}{3594}\\div (9\imes 10)=400.1$

一个数的$\\frac{1}{56}$比它的$1$多$60$，求这个数。 设这个数为$x$，则$\\frac{x}{56}=x+60$，解得$x=-3360$ 一个数的$\\frac{1}{2}$倍比$30$的$40\\%$少$0.3$，求这个数。（用方程解）

设这个数为$x$，则$\\frac{1}{2}x=30\imes 0.4-0.3$，解得$x=21$

求阴影部分面积（单位：cm） （图略）

设阴影部分面积为$S$，则$S=\\frac{1}{2}\imes 5\imes 5-\\frac{1}{4}\imes \\pi \imes 5^2=6.43\ext{cm}^2$

分数乘除法计算题专项练3 （略去题目中的乘号和除号符号） 一、直接写出得数

$\\div 22\imes 34=$，$xxxxxxx\\div 12\\div 121\imes =37$，$\\frac{25}{15}=1\\frac{2}{3}$，$22\\div 39\imes 26\\div 11=2$，$8\\div 12\imes \\frac{16}{13}=\\frac{32}{39}$，

$533\\frac{8}{5}\\div 5\\div 6=17\\frac{17}{30}$，$1165\\div 13\imes 121=$，$1838.14\\div 10\imes 21\imes 5\\div 7\\cdot 19\imes 27=$，$34\\div 17\imes 10=20$，$\\frac{1}{7}\\div \\frac{11}{15}= \\frac{15}{77}$，$25\imes 44=1100$，$25\imes 13=325$，$180\\div 9=20$，$xxxxxxxx\\div 14=xxxxxxx$，$(2+\\frac{5}{6})+\\frac{7}{3}=4\\frac{1}{2}$，$6-200\\%=18$，$7.5\\div 0.25\imes 3=90$

二、看谁算得又对又快

$\\div 5\\div 6\\div 21=98$，$\\div 12\imes 8\imes 4\\div 3+25\\%=300$，$11\\frac{8}{25}\imes 25\\%\\div

\\frac{8}{25}\imes 25\\%=1$，$12\imes \\frac{1}{3}+12\\div \\frac{2}{3}=16$，$\\div 35\imes 20\imes 14\imes \\frac{7}{15}\imes \\frac{16}{16}+(\\frac{7}{16}-\\frac{1}{4})=620$，$1555+313\\div 9-36\imes

(2+\\frac{1}{3})=$，$3221\imes \\frac{1}{2}+\\frac{1}{4}\\div (1+\\frac{1}{2})=1610.25$，$\\frac{4}{9}-\\frac{7}{14}+\\frac{9}{}\imes \\frac{8}{7}\\div \\frac{3}{5}=-

\\frac{11}{42}$，$7\\frac{3}{5}\imes 11+\\frac{5}{4}\\div 4=87\\frac{3}{20}$

三、解方程

$x-\\frac{5}{8}=\\frac{9}{10}$，解得$x=\\frac{41}{40}$，$12x=\\frac{9}{10}$，解得$x=\\frac{3}{40}$

四、先化简比，再求比值

$24:48=1:2$，$5:8=25:40$，甲数为30，乙数为是乙数的$\\frac{30}{25}=1.2$倍。

25，甲数

3. $24$

1. 14x = 42，x = 3 2. 20 - 10 = 10

3. B = 60 x 0.25 / 1.25 = 12 4. 0

5. 14x = 140, x = 10 6. 3 x 5 - 25 / 5 = 4 7. 乙 = 21，甲 = 15 8. 11x = 24，x = 24/11 五、

(1) 设下底为x，则上底为x+6，由梯形面积公式得：1/2(x+x+6) x 12 = 72，解得x=4，上底为10，阴影部分面积为1/2(10-4) x 12 = 36