how to do lcm method
Answers
Answer:
Step-by-step explanation:
for example to find lcm of 24,36 and 45
firstly we have to take least prime number which divides perfectly at least two of the given numbers.
prime numbers are 2,3,5,7,11 and so on
least one is 2 . and 2 divides 24 and 36
then with 2 | 24, 36, 45
12, 18, 45
2*12=24; 2*18=36; 45 is not divisible by 2
again 2 divides 12 and 18
2 | 12, 18, 45
6, 9, 45
only 6 is divided by 2. but condition is to divide at least 2 numbers
hereafter those 3 numbers are divided by 3
3 | 6, 9, 45
2, 3, 15
2 is not possible, so by 3
3 | 2, 3, 15
2, 1, 5
2,1 and 5 are prime numbers. hence leave
finally 2 | 24, 36, 45
2 | 12, 18, 45
3 | 6, 9, 45
3 | 2, 3, 15
2, 1, 5
LCM = 2*2*3*3*2*1*5=180
Answer:
Step-by-step explanation:
Step 1) Find the GCF for the two numbers.
For 18 and 30, GCF is 6.
Step 2) Divide that GCF into either number; it doesn’t matter which one you choose, so choose the one that’s easier to divide.
Choose 18. Divide 18 by 6. Answer = 3.
Step 3) Take that answer and multiply it by the other number.
3 x 30 = 90
Step 4) Celebrate …
… because the answer you just got is the LCM. It’s that easy.