Prime & Composite
A number that has only 2 factors: 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)
50 divided by 2 = _________
25
Solve.
(4x5)+(5x6)= ______
20+30=50
6x10=___
A number that has MORE than 2 factors.
What is a composite number?
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?
What is 24 divided by 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 in total?
5x4=20
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?
What is 40 years old? (10 x 4)
Jack saw 5 columns of crayons in a box of 30 markers. How many markers are in each column? Solve.
What is 30 divided by 5=6 in each column
The 2nd grade has 60 students. The 4th grade has 2 times as many students as in 2nd grade. How many MORE students are in 4th grade?
60x2=120 students
120-60=60 more students
8
9 is a ___________ number. Because _________________________
What is a composite number because it has more than 2 factors (1, 3, 9)?
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 cost $24 and the book cost $8. How many times more than the book did the toy cost?
What is 24 divided by 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 equally between the two classes. How many books will each class get?
What is 20 books?
Ms. B= 5x6=30
Ms. K= 2x5=10
30+10=40
40 divided by 2= 20 books each class
7x_____=35
5
List ALL the factors for 24.
What are 1, 2, 3, 4, 6, 8, 12, 24?
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?
What is 40 divided by 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 many markers as the green table.
How many packs of markers does the class need?
What is
4x2=8
8x4=32 packs of markers
____x5=35
7