Least Common Multiple from Multiples of Numbers to 10 (LCM Not ... - Free Printable

Let's solve each problem step by step to find the Least Common Multiple (LCM) using the multiples of each number.

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🔹 Problem 1: LCM of 7 and 9

Step 1: List the multiples of each number:

- Multiples of 7:
7, 14, 21, 28, 35, 42, 49, 63, 70, ...

- Multiples of 9:
9, 18, 27, 36, 45, 54, 63, 72, ...

Step 2: Find the smallest common multiple.

→ The first common multiple is 63.

✔ LCM = 63

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🔹 Problem 2: LCM of 10 and 9

Multiples of 10:
10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ...

Multiples of 9:
9, 18, 27, 36, 45, 54, 63, 72, 81, 90, ...

→ First common multiple: 90

✔ LCM = 90

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🔹 Problem 3: LCM of 9 and 8

Multiples of 9:
9, 18, 27, 36, 45, 54, 63, 72, 81, ...

Multiples of 8:
8, 16, 24, 32, 40, 48, 56, 64, 72, ...

→ First common multiple: 72

✔ LCM = 72

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🔹 Problem 4: LCM of 6 and 5

Multiples of 6:
6, 12, 18, 24, 30, 36, ...

Multiples of 5:
5, 10, 15, 20, 25, 30, ...

→ First common multiple: 30

✔ LCM = 30

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🔹 Problem 5: LCM of 5 and 4

Multiples of 5:
5, 10, 15, 20, 25, ...

Multiples of 4:
4, 8, 12, 16, 20, ...

→ First common multiple: 20

✔ LCM = 20

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✔ Final Answers:

1. LCM of 7 and 9 = 63
2. LCM of 10 and 9 = 90
3. LCM of 9 and 8 = 72
4. LCM of 6 and 5 = 30
5. LCM of 5 and 4 = 20

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Let me know if you'd like a visual chart or explanation using prime factorization!