Question

LCM of 70,80 prime factorisation method
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Answer 1

Find the prime factorization of 70
70 = 2 × 5 × 7
Find the prime factorization of 80
80 = 2 × 2 × 2 × 2 × 5
Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the LCM:

LCM = 2 × 2 × 2 × 2 × 5 × 7
LCM = 560

Answer 2

Hello , here is your answer :

Answer:

The LCM of 70 and 80 is 560.

Step-by-step explanation:

Find the prime factorization of 70

70 = 2 × 5 × 7

Find the prime factorization of 80

80 = 2 × 2 × 2 × 2 × 5

Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the LCM:

LCM = 2 × 2 × 2 × 2 × 5 × 7

LCM = 560

I hope it will help you .