Download presentation

Presentation is loading. Please wait.

Published byBrandon Williams Modified over 8 years ago

1
HCF and LCM Primes Press Ctrl-A ©2009 G Dear – Not to be sold/Free to use Stage 4 Years 7 & 8 Web Resources

2
2 HCF/LCM and Prime Factor (1/3)1218 3 4 3 22 2 9 33 2 x xx x xx Prime Factors 12 = 2 x 2 x 3 Prime Factors 18 = 2 x 3 x 3 Circle the common factors HCF = 2 x 3 = 6 1218 Find the HCF of 12 and 18. LCM = HCF x 2 x 3 Underline the remaining numbers = 6 x 2 x 3 = 36 End of Slide

3
3 HCF/LCM and Prime Factor (2/3)2745 3 9 3 33 3 15 35 3 x xx x xx Prime Factors 27 = 3 x 3 x 3 Prime Factors 45 = 3 x 3 x 5 Circle the common factors HCF = 3 x 3 = 9 2745 Find the HCF of 27 and 45. LCM = HCF x 3 x 5 Underline the remaining numbers = 9 x 3 x 5 = 135 End of Slide

4
4 HCF and LCM (3/3)Exercises Use Prime Factor Trees to find the HCF and LCM of: a) 24 and 36 b) 36 and 54 c) 24 and 56 d) 54 and 56 e) 60 and 36 f) 15 and 40 End of Slide

Similar presentations

© 2023 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google