Rule of 4
Add using the Rule of 4:
2/7 + 3/11 =
43/77
Write the formula for area of a circle.
πr2
Is 47 divisible by 3?
no
Solve for the unknown:
8Z = 72
Z = 9
1/7 = ?/? = ?/? = 4/28
2/14, 3/21
Subtract using the Rule of 4:
2/3 - 1/4 =
5/12
Write the formula for circumference of a circle.
2πr
The GCF of 16 and 24 is?
8
Ethan read B books. Isaac read five times as many books as Ethan did. If Isaac read 15 books, how many did Ethan read?
Ethan read 3 books
2/5 - 1/4 =
3/20
Use the Rule of 4 to compare the fractions:
5/10 ? 6/12
=
Find the area of a circle when r = 11 inches
380 2/7 sq. in.
List the prime factors of 36
3x3x2x2
Solve for the unknown:
4C + 7 = 31
C = 6
5/8 ÷ 6/8 =
5/6
Use the Rule of 4 to compare the fractions:
3/5 ? 1/3
>
Find the circumference of a circle when r = 11 inches
69 1/7 in.
List the prime factors of 75
5x5x3
Solve for the unknown:
1/10 H - 4 = 0
H = 40
Mom is making 1/3 of a recipe that calls for 2/3 cups of flour. How much flour should she use?
2/9 cups
Use the Rule of 4 to compare the fractions:
2/5 ? 3/8
>
The paper Stephanie is using for her art project measures nine inches from the center to the edge. What would be the approximate circumference of the biggest circle she could cut from it?
56 4/7 inches
The GCF of 54 and 36 is?
18
Solve for the unknown:
1/2P - 1/8 = 1/4
P = 3/4
19 7/8 + 2 5/10 =
22 3/8