Prime & Composite
A number that can only be multiplied by 1 and itself.
What is a prime number?
Jenna is 11 years old. Her grandma is 6 times older than Jenna. How old is the grandma?
What is 66 years old? (11x6)
36 divided by 6 = _________
6
Solve.
(4x5)+(5x6)= ______
20+30=50
What is the second multiple of 3?
6
16 is a ___________ number. Because _________________________
composite number because of factor pairs 1x16, 2x8, and 4x4
Jeremy got candy for Christmas. He got 21 pieces of candy. His sister got 3 times as much candy as Jeremy. What equation represents how much candy his sister got?
21x3=C (c represents candy)
Ms. H has 24 students in her math class. Ms. J has half the amount of students. How many students does Ms. J have?
24/2=12 students
Table 1 has 5 students. Each student has 4 pencils. Table 2 has 4 students. Each student has 4 pencils.
How many pencils do both groups have total?
4x4=16
20+16=36 pencils total
3x8=____
24
What kind of number is 7? Prime or composite? Why?
What is a prime number because its only factors are 1 and 7?
Ms. Green is 4 times as old as Mason. Mason is 10 years old. How old is Ms. Green?
10x4=40 years old
30/5=6 in each column
The 2nd grade has 60 students. The 4th grade has 2 times as many students in 2nd grade. How many MORE students are in 4th grade?
60x2=120 students
120-60=60 more students
What is the fifth multiple of 7?
35
List all the factors for 20
What are... 1,2,4,5,10,20
Ms. Breidenstein bought pants and a top. The pants were 3 times as much as the top. The top costs $15. How much were the pants?
15x3=$45 for the pants
Krista bought a book and a toy. The toy costed $24 and the book costed $8. How many times more than the book did the toy cost?
24/8=3 times more
Ms. B has 5 library bins. Each bin has 6 books.
Ms. K has 2 library bins. Each bin has 5 books.
They need to combine their books and divide them EVENLY between the two classes? How many books will each class get?
Ms. B= 5x6=30
Ms. K= 2x5=10
30+10=40
40/2= 20 books each class
if the area of a rectangle is 48 feet and one side is 8 feet how long is the other side?
6 feet.
List ALL the factors for 48.
What are 1, 2, 3, 4, 6, 8, 12, 16, 24, 48
What equation represents
"35 markers are 7 times the 5 crayons at the purple table"?
7x5=35 markers
Katherine needed cookies for her birthday party. Cookies came in packs of 5. She has 40 people coming to her party. How many packs of cookies will she need?
40/5=8 packs of cookies.
There are 4 students at the green table. They each brought 2 packs of markers. The class needs 4 times as much markers as the green table. How many packs of markers does the class need?
4x2=8x4=32 packs of markers
____ x 22 = 2,200
100