Lesson Notes By Weeks and Term - Primary 4

WEEK FOUR

�SUBJECT: MATHEMATICS

CLASS: PRIMARY 4

TERM: 2^ND TERM

LEAST COMMON MULTIPLES ( LCM)

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Example 1:

Find the least common multiples of 2 and 3

The multiples of 2 are: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24

The multiples of 3 are: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36

Thus the common multiples of 2 and three are 6, 12, 18 and 24

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The smallest of these multiples(i.e. the least) is 6

We say that the least common multiples of 2 and 3 is 6.

That is L.C.M of 2 and 3 is 6

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EXERCISE

Find the� by listing the multiples of:

1. 2 and 5
2. 3 and 4
3. 3 and 5
4. 4, 2 and 6
5. 2 and 7
6. 2 and 12
7. 3 and 7
8. 3 and 12
9. 2, 3 and 5
10. 2 and 10
11. 2, 4 and 6
12. 3 and 15
13. 4 and 7
14. 4 and 7