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.
(4x4)+(6x6)= ______
16 + 36 = 52
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?
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?
List the first 5 multiples of 8
8, 16, 24, 32, 40
30/5=6 in each column
Kinder, Form 1 and Form 2 have a total of 65 students. Forms 3, 4, 5 have 3 times as many students as there are in Kinder, Form 1 and Form 2. How many MORE students are in Forms 3, 4 and 5?
65 x 3 = 195
195 - 65 = 130
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 $17. How much were the pants?
AND how much did he spend on altogether?
17x3=$51 for the pants
He spent $68.
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?
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_____=420
60
List ALL the factors for 20.
What is 1, 20, 10, 2, 5, and 4?
Kailey picked 20 flowers. That is 5 times as many as her little brother Adrian, picked. How many flowers did Adrian pick?
20 / 5 = 4 flowers
Kathy needed cookies for her birthday party. Cookies came in packs of 8. She has 56 people coming to her party. How many packs of cookies will she need?
56/8=7 packs of cookies.
Joshua has 98 milliliters of red paint and 39 milliliters of yellow paint. He mixed all of the paint together to make orange paint. How many milliliters of orange paint does he have now?
AND does he have enough paint to make 1 liter?
98 + 39 = 137 milliliters
No, this is not enough for a liter. 1L = 1,000 mL
____x5=350
70