Prime & Composite
A number with only 2 factors is ______________.
a prime number
Jenna is 13 years old. Her grandma is 5 times older than Jenna. How old is the grandma?
What is 65 years old? (13x5)
Dani has 45 marbles. She has 5 times as many marbles as Joe has.
How many marbles does Joe have?
45 / 5 = 9
Solve.
(4x8)x5= ______
4 x 8 = 32
32 x 5 = 160
Sasha has 4 quarters in her pocket. She has 6 times as many quarters in her piggy bank.
24 quarters
A number with more than 2 factors is ________________.
a composite number
Marcus has 15 toy cars. That is 3 times as many as his brother Craig. How many toy cars does Craig have? Write an equation for how many cars Craig has. (c stands for Craig's toy cars)
15/3=C
3 x c = 15
Ms. H has 24 students in her math class. Ms. S one third the amount of students. How many students does Ms. S have?
24/3=8 students
Table 1 has 4 students. Each student has 3 pencils. Table 2 has 6 students. Each student has 4 pencils.
How many pencils do both groups have total?
4 x 3 = 12
6 x 4 =24
12 + 24 = 36 pencils total
3x7=____
21
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 9 years old. How old is Ms. Green?
9x4=36 years old
Jack saw 5 columns of crayons in a box of 60 markers. How many markers are in each column? Solve.
60/5=12 in each column
The 2nd grade has 80 students. The 4th grade has 2 times as many students than 2nd grade. How many MORE students are in 4th grade?
80x2=160 students
160-80=80 more students
A truck is parked next to a tree. The height of the truck is 6 feet. The height of the tree is 3 times the height of the truck. What equation can be used to find the height of the tree?
6 x 3 = ___
32 is a ___________ number because _________________________
composite number because it has more than 2 factors (1,32,2,16,4,8)?
Mr. Zeoli bought a sub sandwich and chips. The sub was 3 times as much as the chips. The chips costs $3. How much was the sub sandwich?
3x3=$9 for sub sandwich
Krista bought a pair of gloves and a coat. The coat was $54 and the gloves were $9. How many times more than the gloves did the coat cost?
54/9=6 times more
Each of the 4 students at the blue table have 8 markers. The class has 3 times as many as the entire blue table. How many markers does the whole class have?
Blue Table= 4 x 8 = 32
Whole class= 32 x 3 = 96
7x_____=49
7
List ALL the factors for 48.
1 x 48
2 x 24
3 x 16
4 x 12
6 x 8
What equation represents
"35 markers are 7 times the 5 crayons at the purple table"?
7x5=35 markers
Katie needed cupcakes for her birthday party. Cupcakes came in packs of 12. She has 36 people coming to her party. How many packs of cupcakes will she need?
36/12=3 packs of cookies.
There are 5 students in the purple group. They each brought 3 packs of paper to school. The class needs 8 times as much paper as the entire purple group brought. How much paper does the class need?
5 x 3 =15 x 8 = 120 packs of paper
Peter is listing all the factors of 72. Which factor pair should be included in his list?
A. 4 x 18
B. 2 x 70
C. 7 x 9
D. 7 x 12
4 x 18