Prime or Composite
Prime or composite?
19
Prime
List the first 5 multiples of 3.
3, 6, 9, 12, 15
What's the rule for this pattern?
9, 12, 15, 18, 21....
Add 3.
Formula used to find perimeter?
P= L+L+W+W or L (squared) + W (squared)
Use mental math to solve.
600 x 4 =?
2,400
Prime or composite?
81
Composite
(1x81, 9x9)
List one factor pair of 12.
Possible answers:
(1,12)
(2,6)
(3,4)
What's the rule for this pattern?
32, 28, 24, 20, 16....
Subtract 4.
Formula used to find area?
A= L x W
Use mental math to solve.
810 divided by 9 = ?
90
33 is a prime number because it's odd.
False. 33 is a composite number because it has more than 1 factor pair.
4, 8, 16, 24
4 - 4 is a factor of 8, NOT a multiple.
Erica starts at the number 6. She creates a pattern by using the rule: Add 5. What would be the next 5 terms in the pattern?
6, ___, ___, ___, ___, ____
6... 11, 16, 21, 26, 31
Find the area of a rectangle that measures with a length of 12 cm and a width of 6 cm.
72 cm2
Mr. Endo buys 7 boxes of crayons. Each box has 48 crayons. How many crayons does he buy in all?
336 crayons
True or False?
All even numbers are composite.
False.
For example, 2 is a prime number. Only factors are 2 and 1.
List all of the factors of 60.
1x60
20x3
10x6
12x5
15x4
30x2
Jason drives 4 miles. Cameron drives 5 times as many miles as Jason. Frank drives twice as far as Cameron. How many miles does Cameron drive? How far does Frank drive?
Cameron drives 20 miles.
Frank drives 40 miles.
What is the perimeter of a square with a side length of 8 in.?
Solve using any strategy. Be ready to explain your strategy.
56 divided by 4 =?
14
Using complete sentences, explain prime and composite.
Prime = A number that only has factors of 1xitself
Composite = A number that has more than one/2 or more factor pair.
List all of the factors of 15.
Also, list the first 5 multiples of 15.
Factors: 1, 15, 3, 5
Multiples: 15, 30, 45, 60, 75
5, 10, 15, 20, 25, 30.....
Will the 30th number (term) in this pattern be odd or even? How do you know?
Even, because every other number in the pattern ends in a zero and zero is even, so the 2nd term, 4th, 6th, 8th, etc....
All of the other numbers end in a 5 (so the 1st term, 3rd, 5th, 7th, etc.) and 5 is even.
Since the 30th term would have a zero I know it's even.
A rectangles total area measures 55 ft. The length of one side is 5 ft. What is the width of the missing side? Explain how you know.
11 ft. because the formula for area is A= L x W
So, if 55 ft. is the total, and the length of one side is 5, the missing side would be 11 because 55= 5 x ___ ? The missing number would be 11.
Multiply using any strategy. Be ready to explain.
23x6=?
138