一、口算。
0.42÷7=
6.8+0.06=
3.6−1.4=
8.5×10=
0.06×90=
8.8÷4.4=
5.88+2.12=
0.72−0.27=
2×2.5=
4×2.03=
9−0.01=
7.2+1.8=
0.93+1.7=
0.24×0.5=
4.08÷8=
$\frac{3}{4} - \frac{3}{8} =$
$\frac{5}{9} + \frac{1}{3} =$
$\frac{3}{8} + \frac{5}{8} =$
$\frac{7}{8} + \frac{31}{48} =$
$\frac{4}{3} - \frac{8}{9} =$
$\frac{17}{35} - \frac{2}{7} =$
$\frac{1}{30} + \frac{1}{6} =$
$\frac{5}{8} - \frac{1}{6} =$
$\frac{5}{9} + \frac{1}{4} =$
0.42÷7=
6.8+0.06=
3.6−1.4=
8.5×10=
0.06×90=
8.8÷4.4=
5.88+2.12=
0.72−0.27=
2×2.5=
4×2.03=
9−0.01=
7.2+1.8=
0.93+1.7=
0.24×0.5=
4.08÷8=
$\frac{3}{4} - \frac{3}{8} =$
$\frac{5}{9} + \frac{1}{3} =$
$\frac{3}{8} + \frac{5}{8} =$
$\frac{7}{8} + \frac{31}{48} =$
$\frac{4}{3} - \frac{8}{9} =$
$\frac{17}{35} - \frac{2}{7} =$
$\frac{1}{30} + \frac{1}{6} =$
$\frac{5}{8} - \frac{1}{6} =$
$\frac{5}{9} + \frac{1}{4} =$
答案
1. 0.06
2. 6.86
3. 2.2
4. 85
5. 5.4
6. 2
7. 8
8. 0.45
9. 5
10. 8.12
11. 8.99
12. 9
13. 2.63
14. 0.12
15. 0.51
16. $\frac{3}{8}$
17. $\frac{8}{9}$
18. 1
19. $\frac{73}{48}$
20. $\frac{4}{9}$
21. $\frac{1}{5}$
22. $\frac{1}{5}$
23. $\frac{11}{24}$
24. $\frac{29}{36}$
2. 6.86
3. 2.2
4. 85
5. 5.4
6. 2
7. 8
8. 0.45
9. 5
10. 8.12
11. 8.99
12. 9
13. 2.63
14. 0.12
15. 0.51
16. $\frac{3}{8}$
17. $\frac{8}{9}$
18. 1
19. $\frac{73}{48}$
20. $\frac{4}{9}$
21. $\frac{1}{5}$
22. $\frac{1}{5}$
23. $\frac{11}{24}$
24. $\frac{29}{36}$
二、计算下面各题,能用简便算法的就用简便算法。
32.5÷2.5÷0.4
10.1×9.5
36×[(17.5+1.22)÷26]
72.3−40.5÷0.81
1.25×8.8
(7.5−7.5×0.9)÷7.5
32.5÷2.5÷0.4
10.1×9.5
36×[(17.5+1.22)÷26]
72.3−40.5÷0.81
1.25×8.8
(7.5−7.5×0.9)÷7.5
答案
1. 32.5
2. 95.95
3. 25.92
4. 22.3
5. 11
6. 0.1
2. 95.95
3. 25.92
4. 22.3
5. 11
6. 0.1
登录