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
6x10=___
A number that has MORE factors than 1 and itself.
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?
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
8
16 is a ___________ number. Because _________________________
What is a composite number because it has multiple factors (1,16,2,8,4)?
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
7x_____=42
6
List ALL the factors for 20.
What is 1, 20, 10, 2, 5, and 4?
What equation represents
"35 markers are 7 times the 5 crayons at the purple table"?
7x5=35 markers
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
____x5=35
7