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一、口算。
$3.3+4.77=$
$5.4÷ 3=$
$3.02-1.2=$
$20÷ 2.5=$
$475-365=$
$12.8× 0.5=$
$208÷ 4=$
$59.8+141.2=$
$44.4× 0.2=$
$3× 335=$
$9.6-4.72=$
$8.8× 0.8=$
$\frac{5}{12}÷ \frac{1}{4}=$
$\frac{4}{5}× \frac{7}{12}=$
$\frac{32}{11}÷ \frac{2}{33}=$
$\frac{15}{16}÷ \frac{5}{8}=$
$\frac{3}{22}× 0.44=$
$10÷ \frac{5}{7}=$
$\frac{6}{7}÷ \frac{3}{5}=$
$5-\frac{3}{4}=$
$\frac{1}{2}÷ \frac{2}{5}=$
$12÷ \frac{4}{7}=$
$\frac{2}{3}× \frac{1}{4}=$
$\frac{4}{5}-0.5=$
$3.3+4.77=$
$5.4÷ 3=$
$3.02-1.2=$
$20÷ 2.5=$
$475-365=$
$12.8× 0.5=$
$208÷ 4=$
$59.8+141.2=$
$44.4× 0.2=$
$3× 335=$
$9.6-4.72=$
$8.8× 0.8=$
$\frac{5}{12}÷ \frac{1}{4}=$
$\frac{4}{5}× \frac{7}{12}=$
$\frac{32}{11}÷ \frac{2}{33}=$
$\frac{15}{16}÷ \frac{5}{8}=$
$\frac{3}{22}× 0.44=$
$10÷ \frac{5}{7}=$
$\frac{6}{7}÷ \frac{3}{5}=$
$5-\frac{3}{4}=$
$\frac{1}{2}÷ \frac{2}{5}=$
$12÷ \frac{4}{7}=$
$\frac{2}{3}× \frac{1}{4}=$
$\frac{4}{5}-0.5=$
答案
1. $3.3+4.77=8.07$
2. $5.4÷ 3=1.8$
3. $3.02-1.2=1.82$
4. $20÷ 2.5=8$
5. $475-365=110$
6. $12.8× 0.5=6.4$
7. $208÷ 4=52$
8. $59.8+141.2=201$
9. $44.4× 0.2=8.88$
10. $3× 335=1005$
11. $9.6-4.72=4.88$
12. $8.8× 0.8=7.04$
13. $\frac{5}{12}÷ \frac{1}{4}=\frac{5}{3}$
14. $\frac{4}{5}× \frac{7}{12}=\frac{7}{15}$
15. $\frac{32}{11}÷ \frac{2}{33}=48$
16. $\frac{15}{16}÷ \frac{5}{8}=\frac{3}{2}$
17. $\frac{3}{22}× 0.44=\frac{3}{50}$
18. $10÷ \frac{5}{7}=14$
19. $\frac{6}{7}÷ \frac{3}{5}=\frac{10}{7}$
20. $5-\frac{3}{4}=4\frac{1}{4}$
21. $\frac{1}{2}÷ \frac{2}{5}=\frac{5}{4}$
22. $12÷ \frac{4}{7}=21$
23. $\frac{2}{3}× \frac{1}{4}=\frac{1}{6}$
24. $\frac{4}{5}-0.5=\frac{3}{10}$
2. $5.4÷ 3=1.8$
3. $3.02-1.2=1.82$
4. $20÷ 2.5=8$
5. $475-365=110$
6. $12.8× 0.5=6.4$
7. $208÷ 4=52$
8. $59.8+141.2=201$
9. $44.4× 0.2=8.88$
10. $3× 335=1005$
11. $9.6-4.72=4.88$
12. $8.8× 0.8=7.04$
13. $\frac{5}{12}÷ \frac{1}{4}=\frac{5}{3}$
14. $\frac{4}{5}× \frac{7}{12}=\frac{7}{15}$
15. $\frac{32}{11}÷ \frac{2}{33}=48$
16. $\frac{15}{16}÷ \frac{5}{8}=\frac{3}{2}$
17. $\frac{3}{22}× 0.44=\frac{3}{50}$
18. $10÷ \frac{5}{7}=14$
19. $\frac{6}{7}÷ \frac{3}{5}=\frac{10}{7}$
20. $5-\frac{3}{4}=4\frac{1}{4}$
21. $\frac{1}{2}÷ \frac{2}{5}=\frac{5}{4}$
22. $12÷ \frac{4}{7}=21$
23. $\frac{2}{3}× \frac{1}{4}=\frac{1}{6}$
24. $\frac{4}{5}-0.5=\frac{3}{10}$
二、根据比例的基本性质，在括号里填合适的数。
$3.5:\frac{2}{5}=(\ \ \ \ \ ):2$
$7:(\ \ \ \ \ )=21:1.5$
$\frac{3}{8}:\frac{2}{5}=(\ \ \ \ \ ):\frac{6}{5}$
$7:(\ \ \ \ \ )=\frac{2}{3}:0.6$
$(\ \ \ \ \ ):\frac{4}{5}=\frac{15}{2}:\frac{8}{3}$
$1.5:(\ \ \ \ \ )=2:\frac{4}{5}$
$\frac{1}{4}:(\ \ \ \ \ )=0.4:4.8$
$\frac{1}{4}:(\ \ \ \ \ )=1.25:9$
$3.36:2.8=2.4:(\ \ \ \ \ )$
$\frac{4}{7}:(\ \ \ \ \ )=4:\frac{2}{5}$
$(\ \ \ \ \ ):\frac{1}{6}=\frac{1}{10}:\frac{2}{15}$
$\frac{5}{4}:\frac{2}{3}=\frac{3}{8}:(\ \ \ \ \ )$
$\frac{1}{6}:\frac{4}{5}=(\ \ \ \ \ ):48$
$(\ \ \ \ \ ):\frac{3}{5}=\frac{4}{7}:\frac{4}{5}$
$8.5:(\ \ \ \ \ )=4.25:3$
$3.5:\frac{2}{5}=(\ \ \ \ \ ):2$
$7:(\ \ \ \ \ )=21:1.5$
$\frac{3}{8}:\frac{2}{5}=(\ \ \ \ \ ):\frac{6}{5}$
$7:(\ \ \ \ \ )=\frac{2}{3}:0.6$
$(\ \ \ \ \ ):\frac{4}{5}=\frac{15}{2}:\frac{8}{3}$
$1.5:(\ \ \ \ \ )=2:\frac{4}{5}$
$\frac{1}{4}:(\ \ \ \ \ )=0.4:4.8$
$\frac{1}{4}:(\ \ \ \ \ )=1.25:9$
$3.36:2.8=2.4:(\ \ \ \ \ )$
$\frac{4}{7}:(\ \ \ \ \ )=4:\frac{2}{5}$
$(\ \ \ \ \ ):\frac{1}{6}=\frac{1}{10}:\frac{2}{15}$
$\frac{5}{4}:\frac{2}{3}=\frac{3}{8}:(\ \ \ \ \ )$
$\frac{1}{6}:\frac{4}{5}=(\ \ \ \ \ ):48$
$(\ \ \ \ \ ):\frac{3}{5}=\frac{4}{7}:\frac{4}{5}$
$8.5:(\ \ \ \ \ )=4.25:3$
答案
1. $3.5:\frac{2}{5}=(17.5):2$
2. $7:(0.5)=21:1.5$
3. $\frac{3}{8}:\frac{2}{5}=(\frac{9}{8}):\frac{6}{5}$
4. $7:(6.3)=\frac{2}{3}:0.6$
5. $(\frac{9}{4}):\frac{4}{5}=\frac{15}{2}:\frac{8}{3}$
6. $1.5:(0.6)=2:\frac{4}{5}$
7. $\frac{1}{4}:(3)=0.4:4.8$
8. $\frac{1}{4}:(1.8)=1.25:9$
9. $3.36:2.8=2.4:(2)$
10. $\frac{4}{7}:(\frac{2}{35})=4:\frac{2}{5}$
11. $(\frac{1}{8}):\frac{1}{6}=\frac{1}{10}:\frac{2}{15}$
12. $\frac{5}{4}:\frac{2}{3}=\frac{3}{8}:(\frac{1}{5})$
13. $\frac{1}{6}:\frac{4}{5}=(10):48$
14. $(\frac{3}{7}):\frac{3}{5}=\frac{4}{7}:\frac{4}{5}$
15. $8.5:(6)=4.25:3$
2. $7:(0.5)=21:1.5$
3. $\frac{3}{8}:\frac{2}{5}=(\frac{9}{8}):\frac{6}{5}$
4. $7:(6.3)=\frac{2}{3}:0.6$
5. $(\frac{9}{4}):\frac{4}{5}=\frac{15}{2}:\frac{8}{3}$
6. $1.5:(0.6)=2:\frac{4}{5}$
7. $\frac{1}{4}:(3)=0.4:4.8$
8. $\frac{1}{4}:(1.8)=1.25:9$
9. $3.36:2.8=2.4:(2)$
10. $\frac{4}{7}:(\frac{2}{35})=4:\frac{2}{5}$
11. $(\frac{1}{8}):\frac{1}{6}=\frac{1}{10}:\frac{2}{15}$
12. $\frac{5}{4}:\frac{2}{3}=\frac{3}{8}:(\frac{1}{5})$
13. $\frac{1}{6}:\frac{4}{5}=(10):48$
14. $(\frac{3}{7}):\frac{3}{5}=\frac{4}{7}:\frac{4}{5}$
15. $8.5:(6)=4.25:3$
