GCF/LCM
Find the GCF of 8 and 32.
What is the most important thing to remember when adding two decimals together?
To align the decimal points first.
What is important to remember when subtracting decimals?
Line up the decimal points before subtracting!
What should you remember when multiplying decimals?
Before multiplying, count the number of digits after the decimal point. The answer should have the same number of digits behind its decimal point.
What is important to remember when dividing decimals?
The divisor cannot be a decimal. Move the decimal point to the right, and move the decimal in the dividend the same number of spots to the right as well.
Find the GCF of 12, 18, 26.
2
24.2 + 15.6 =
39.8
2.1 - 1.1 =
1
2.1 x 5 =
10.5
2.5 ÷ 5 =
0.5
Find the LCM of 6 and 15.
30
84.3 + 2.5 =
86.8
56.4 - 35.8 =
20.6
2.1 x 0.5 =
1.05
2.5 ÷ 0.5 =
5
Find the LCM of 12 and 18.
36
51.5 + 36.7 =
88.2
35.2 - 22.9 =
12.3
5.6 x 2.9 =
16.24
3.5 ÷ 0.07 =
50
Find the LCM of 9, 12, and 18.
36
52.9 + 942.9 =
995.8
189.26 - 135.68 =
53.58
3.128 x 2.51 =
7.85128
16.4 ÷ .004 =
4,100