Introduction to Decimals Practice Questions

To review these concepts, go to Introduction to Decimals Study Guide.

Introduction to Decimals Practice Questions

Practice

Write out the following decimals in words.

1. 0.1 __________________________________
2. 0.01 _________________________________
3. 0.001 ________________________________
4. 0.0001 _______________________________
5. 0.00001 _______________________________
6. 5.19 _________________________________
7. 1.0521 _______________________________

Write the following as decimals or mixed decimals.

8. Six tenths
9. Six hundredths
10. Twenty-five thousandths
11. Three hundred twenty-one thousandths
12. Nine and six thousandths
13. Three and one ten-thousandth
14. Fifteen and two hundred sixteen thousandths

Change these decimals or mixed decimals to fractions in lowest terms.

15. 0.1
16. 0.03
17. 0.75
18. 0.6
19. 0.005
20. 0.125
21. 0.046
22. 5.04
23. 4.15
24. 123.45

Change these fractions to decimals.

Order each group from lowest to highest.

35. 0.2, 0.05, 0.009
36. 0.417, 0.422, 0.396
37. 0.019, 2.009, 0.01
38. 0.82, 0.28, 0.8, 0.2
39. 0.3, 0.30, 0.300
40. 0.5, 0.05, 0.005, 0.505

Round each decimal to the nearest whole number.

41. 0.03
42. 0.796
43. 9.49
44. 3.33
45. 8.5
46. 7.8298

Round each decimal to the nearest tenth.

47. 4.76
48. 19.85
49. 0.818
50. 9.49
51. 2.97
52. 12.09
53. 7.8298

Solutions

1. One tenth
2. One hundredth
3. One thousandth
4. One ten-thousandth
5. One hundred-thousandth
6. Five and nineteen hundredths
7. One and five hundred twenty-one ten-thousandths
8. 0.6 (or .6)
9. 0.06
10. 0.025
11. 0.321
12. 9.006
13. 3.0001
14. 15.216
15. 
16. 
17. 
18. 
19. 
20. 
21. 
22. 
23. 
24. 
25. 0.4
26. 0.25
27. 0.7
28. 
29. 
30. 0.875
31. 
32. 
33. 4.75
34. 2.2
35. 0.009, 0.05, 0.2
36. 0.396, 0.417, 0.422
37. 0.01, 0.019, 2.009
38. 0.2, 0.28, 0.8, 0.82
39. All have the same value
40. 0.005, 0.05, 0.5, 0.505
41. 0
42. 1
43. 9
44. 3
45. 9
46. 8
47. 4.8
48. 19.9
49. 0.8
50. 9.5
51. 3.0
52. 12.1
53. 7.8