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Multiplying Decimals (3 Digit by 1 Digit)
- 1. For more maths help & free games related to
this, visit: www.makemymathsbetter.com
- 4. For example 3.97 x 6
Set the question out like this:
T U . t h
3 . 9 7
X 6
2 9 .8
2
- 5. Always make sure that the decimal
points are lined up correctly
T U . t h
3 . 9 7
X 6
2 9 .8
2
- 6. Always make sure that the decimal
points are lined up correctly
T U . t h
3 . 9 7
X 6
2 9 .8
2
- 7. Then multiply the number in the
hundredths column (7)
T U . t h
3 . 9 7
X 6
2 9 .8
2
- 8. Then multiply the number in the
hundredths column (7) by 6
T U . t h
3 . 9 7
X 6
2 9 .8
2
- 10. 7 x 6 = 42
T U . t h
3 . 9 7
X 6
2 9 .8
2
- 11. 7 x 6 = 42
The 2 is placed in the answer
bar, in the hundredths column
T U . t h
3 . 9 7
X 6
2 9 .8
2
- 12. 7 x 6 = 42
The 2 is placed in the answer
bar, in the hundredths column
T U . t h
3 . 9 7
X 6
2 9 .8
2
- 13. 7 x 6 = 42
The 4 is placed under the answer
bar, under the tenths column
T U . t h
3 . 9 7
X 6
2 9 .8
2
- 14. 7 x 6 = 42
The 4 is placed under the answer
bar, under the tenths column
T U . t h
3 . 9 7
X 6
2 9 .8
4
2
- 16. Next, multiply the number in the
tenths column (9) by 6
T U . t h
3 . 9 7
X 6
2 9 . 8 2
4
- 18. 9 x 6 = 54
T U . t h
3 . 9 7
X 6
2 9 . 8 2
4
- 19. 9 x 6 = 54
This is added to the 4 from under
the tenths column
T U . t h
3 . 9 7
X 6
2 9 . 8 2
4
- 20. 54 + 4 = 58
T U . t h
3 . 9 7
X 6
2 9 . 8 2
4
- 21. 54 + 4 = 58
The 8 is put in the tenths column
T U . t h
3 . 9 7
X 6
2 9 . 8 2
4
- 22. 54 + 4 = 58
The 5 is placed under the answer
bar, under the units column
T U . t h
3 . 9 7
X 6
2 9 . 8 2
5
4
- 23. Now, multiply the number in the
units column (3)
T U . t h
3 . 9 7
X 6
2 9 . 8 2
5
4
- 24. Now, multiply the number in the
units column (3) by 6
T U . t h
3 . 9 7
X 6
2 9 . 8 2
5
4
- 25. 3 x 6 = 18
T U . t h
3 . 9 7
X 6
2 9 . 8 2
5
4
- 26. 3 x 6 = 18
This is added to the 5 from under
the units column
T U . t h
3 . 9 7
X 6
2 9 . 8 2
5
4
- 27. 18 + 5 = 23
T U . t h
3 . 9 7
X 6
2 3 . 8 2
5
4
- 28. 18 + 5 = 23
The 3 is placed in the units column
T U . t h
3 . 9 7
X 6
2 9 . 8 2
5
4
- 29. 18 + 5 = 23
The 3 is placed in the units column
T U . t h
3 . 9 7
X 6
2 3 . 8 2
5
4
- 30. 18 + 5 = 23
The 2 is placed in the tens column
T U . t h
3 . 9 7
X 6
2 3 . 8 2
5
4
- 31. 18 + 5 = 23
The 2 is placed in the tens column
T U . t h
3 . 9 7
X 6
2 3 . 8 2
5
4
- 32. 3.97 x 6 = 23.82
T U . t h
3 . 9 7
X 6
2 3 . 8 2
5
4
- 33. That’s it for now......
For more help with your maths, try
my book:
mastering multiplication tables
on amazon.com
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