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# Gcf and lcm

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### Gcf and lcm

1. 1. GCF and LCM<br />Greatest Common Factor <br />and <br />Least Common Multiple<br />
2. 2. LCM and GCF<br />Least Common Multiple (LCM)-<br />Of all common multiples of two or more numbers, the smallest multiple.<br />Greatest Common Factor(GCF)- <br />The greatest common factor of two or more nonzero whole numbers.<br />
3. 3. Using the Ladders methodFind the GCF of 16 and 20<br />16<br />20<br />2<br />÷2<br />÷2<br />2<br />10<br />8<br />GCF=2(2)=4 <br />÷2<br />÷2<br />4<br />5<br />
4. 4. Using the Ladder methodFind the GCF of 24, 40, & 60<br />24<br />40<br />24<br />4<br />÷4<br />÷4<br />÷4<br />2<br />10<br />6<br />6<br />GCF=4(2) = 8 <br />÷2<br />÷2<br />÷2<br />3<br />5<br />3<br />
5. 5. Using the Ladder methodFind the GCF of 28 and 42<br />28<br />42<br />2<br />GCF=2(7)=14 <br />÷2<br />÷2<br />7<br />21<br />14<br />÷7<br />÷7<br />2<br />3<br />
6. 6. Using the Ladder methodFind the LCM of 225 and 380<br />LCM=5(9)(5)(8) =1800<br />225<br />360<br />5<br />÷5<br />÷5<br />9<br />72<br />45<br />÷9<br />÷9<br />5<br />8<br />
7. 7. Using the Ladder methodFind the LCM of 25 and 35<br />LCM=5(5)(7) = 175<br />25<br />35<br />5<br />÷5<br />÷5<br />7<br />5<br />
8. 8. Using the Ladder methodFind the LCM of 24, 40, & 60<br />24<br />40<br />24<br />4<br />÷4<br />÷4<br />÷4<br />2<br />10<br />6<br />6<br />÷2<br />÷2<br />÷2<br />3<br />3<br />5<br />3<br />LCM<br />=4(2)(3) (1)(5)(1)<br />= 120<br />÷3<br />÷3<br />1<br />1<br />5<br />