Prime & Composite
A number that only has two factors; 1 and itself.
What is a prime number?
Lylee is 10 years old. Her grandma is 6 times older than Lylee. How old is the grandma?
What is 60 years old? (10x6)
Mrs. Bettle has 24 students in her class. Mrs. Truex has half the amount of students. How many students does Mrs. Truex have?
24/2=12 students
Solve.
(4x5)+(5x6)= ______
20+30=50
6x10=___
10 x 2 = 5 x 4
What is true!
A number that has MORE factors than 2 factors.
What is a composite number?
Hailey picked 8 flowers. Autumn picked 3 times as many flowers. How many flowers did Autumn pick? Write an equation and solve.
8 x 3 = 24 flowers
36 divided by 6 = _________
6
Table A has 5 students. Each student has 4 pencils. Table B has 4 students. Each student has 4 pencils.
How many pencils do both groups have total?
5x4=20
4x4=16
20+16=36 pencils total
3x8=____
24
42 = (7 x 3) + (7 x 3)
What is true
What kind of number is 7? Prime or composite? Why?
What is a prime number because its only factors are 1 and 7?
Mrs. Germundson is 4 times as old as Kyler (who is 9). How old is Mrs. Germundson? Write an equation and solve.
9 x 4 = 36
Asher has a box with 30 crayons. They crayons are split into 5 rows. How many markers are in each row? Solve.
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 students does 4th grade have?
How many MORE students does 4th grade have than 2nd grade?
60x2=120 students
120-60=60 more students
8
What is true!
16 is a ___________ number. Because _________________________
What is a composite number because it has multiple factors (1,16,2,8,4)?
Ms. Peterson bought a skirt and a top. The skirt was 3 times as much as the top. The top costs $12. How much was the skirt?
12x3=$36 for the skirt
There are 16 fourth grade students in the art room. They need to be split equally between 4 tables. How many students will sit at each table?
16/4= 4 students per table
Ms. B has 5 library bins. Each bin has 6 books.
Ms. K has 2 library bins. Each bin has 5 books.
How many books are there in all?
Ms. B= 5x6=30
Ms. K= 2x5=10
30+10=40
7x_____=42
6
Any even number is a composite number
What is false. 2!
List ALL the factors for 20.
What is 1, 20, 10, 2, 5, and 4?
What equation represents
"The green table has 7 times the amount of 5 crayons at the purple table"?
7x5=35 crayons
Alex needed cookies for his birthday party. Cookies came in packs of 5. He has 40 people coming to his party. How many packs of cookies will he need?
40/5=8 packs of cookies.
Write a story problem to match the equation: 6x6=36
NA
____x5=35
7
What is true