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Q: What job would you have to use LCM and HCF for?

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The HCF helps when reducing fractions. The LCM helps when adding or subtracting fractions.

Use GCF instead of HCF. 6 and 30 would be those numbers...

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weighing scales

Most times the question will specify "find the HCF" or "find the LCM." If you're trying to find common denominators, that's an LCM problem. If you're trying to reduce fractions, that's an HCF problem.

LCM is used to find the lowest common denominator in fractions HCF is used to reduce fractions to their simplest terms

2 and 20 have an HCF of 2 and an LCM of 20. You could also use 4 and 10.

If you are a teacher who works with 27 pupils and 18 pupils and

In finding the LCM or HCF of two or more numbers

Chefs, carpenters, anyone who has to add, subtract or simplify fractions.

For adding and subtracting fractions with different denominators and reducing them to their lowest terms.

to measure the tiles for our floor, if you need larger tiles so you could find by HCF and if smaller tiles you could find that by LCM

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