LCM (LCD)
What does LCM stand for?
Least Common Multiple
Circle Multiplication! Denominator x Whole Number + Numerator.
Turn the Mixed Number 21/2 into an Improper Fraction.
5/2
Fill in the blank.
Never, ever, EVER _______ the denominator
Add or subtract
Fill in the blank.
________________ add or subtract the denominator.
Never, ever, EVER
2/3 x 5/6
10/18 = 5/9
What is the LCM of 4 and 5?
20
Dots and Division. Denominator tells us how big the groups are. How many? Any leftovers? What were you measuring?
Turn the Improper Fraction 7/3 into a Mixed Number.
21/3
Add.
1/3 + 1/3 = ?
2/3
Subtract.
2/3 - 1/3 = ?
1/3
4/8 x 4/3
16/24 = 2/3
What is the LCM of 6 and 4?
12
Turn the Mixed Number 42/3 into an Improper Fraction.
10/3
Add.
2/5 + 3/5 = ?
5/5 or 1 or a Whole
Subtract.
7/8 - 5/8 = ?
2/8
1/6 x 4/7
4/42 = 2/21
What is the LCM of 12 and 5?
60
Turn the Improper Fraction 12/5 into a Mixed Number.
22/5
Add.
1/4 + 2/3 = ?
7/12
Subtract.
2/3 - 1/2 = ?
1/6
9/5 x 5/6
45/30 = 9/6 = 3/2 = 1 1/2
What is the LCM of 15 and 4
60
Turn the Mixed Number 121/8 into an Improper Fraction.
97/8
Add.
3/4 + 4/5 = ?
13/20
Subtract.
8/9 - 2/5 = ?
22/45
9/4 x 5/7
45/28 = 1 17/28