一、口算。
$1.87 - 1.78 =$
$13.8 + 5.2 =$
$17.5 ÷ 0.5 =$
$471 + 679 =$
$18.36 ÷ 3 =$
$6.1 - 3.02 =$
$3.76 - 1.85 =$
$5.6 × 0.8 =$
$6.25 × 2 =$
$25.5 + 0.45 =$
$9.99 ÷ 0.3 =$
$3.6 × 0.03 =$
$\frac{4}{5} ÷ 100 =$
$0.8 × \frac{3}{2} =$
$\frac{17}{11} - \frac{2}{3} =$
$\frac{1}{6} + 0.4 =$
$\frac{5}{6} ÷ \frac{1}{30} =$
$\frac{4}{25} ÷ \frac{8}{5} =$
$\frac{1}{8} + \frac{7}{12} =$
$\frac{3}{4} + \frac{3}{8} =$
$7 ÷ \frac{5}{7} =$
$\frac{4}{5} - \frac{3}{10} =$
$\frac{9}{10} - \frac{5}{6} =$
$0.75 ÷ \frac{5}{6} =$
$1.87 - 1.78 =$
$13.8 + 5.2 =$
$17.5 ÷ 0.5 =$
$471 + 679 =$
$18.36 ÷ 3 =$
$6.1 - 3.02 =$
$3.76 - 1.85 =$
$5.6 × 0.8 =$
$6.25 × 2 =$
$25.5 + 0.45 =$
$9.99 ÷ 0.3 =$
$3.6 × 0.03 =$
$\frac{4}{5} ÷ 100 =$
$0.8 × \frac{3}{2} =$
$\frac{17}{11} - \frac{2}{3} =$
$\frac{1}{6} + 0.4 =$
$\frac{5}{6} ÷ \frac{1}{30} =$
$\frac{4}{25} ÷ \frac{8}{5} =$
$\frac{1}{8} + \frac{7}{12} =$
$\frac{3}{4} + \frac{3}{8} =$
$7 ÷ \frac{5}{7} =$
$\frac{4}{5} - \frac{3}{10} =$
$\frac{9}{10} - \frac{5}{6} =$
$0.75 ÷ \frac{5}{6} =$
答案
1. 0.09
2. 19
3. 35
4. 1150
5. 6.12
6. 3.08
7. 1.91
8. 4.48
9. 12.5
10. 25.95
11. 33.3
12. 0.108
13. $\frac{1}{125}$
14. $\frac{6}{5}$
15. $\frac{29}{33}$
16. $\frac{17}{30}$
17. 25
18. $\frac{1}{10}$
19. $\frac{17}{24}$
20. $\frac{9}{8}$
21. $\frac{49}{5}$
22. $\frac{1}{2}$
23. $\frac{1}{15}$
24. $\frac{9}{10}$
2. 19
3. 35
4. 1150
5. 6.12
6. 3.08
7. 1.91
8. 4.48
9. 12.5
10. 25.95
11. 33.3
12. 0.108
13. $\frac{1}{125}$
14. $\frac{6}{5}$
15. $\frac{29}{33}$
16. $\frac{17}{30}$
17. 25
18. $\frac{1}{10}$
19. $\frac{17}{24}$
20. $\frac{9}{8}$
21. $\frac{49}{5}$
22. $\frac{1}{2}$
23. $\frac{1}{15}$
24. $\frac{9}{10}$
二、用竖式计算。
4.6×2.9=
9.765÷9.3=
5.4×3.96=
0.232÷0.16=
0.68×3.14≈(得数保留两位小数)
36.3÷0.16≈(得数保留两位小数)
4.6×2.9=
9.765÷9.3=
5.4×3.96=
0.232÷0.16=
0.68×3.14≈(得数保留两位小数)
36.3÷0.16≈(得数保留两位小数)
答案
1. 13.34
2. 1.05
3. 21.384
4. 1.45
5. 2.14
6. 226.88
2. 1.05
3. 21.384
4. 1.45
5. 2.14
6. 226.88
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