Prime & Composite
A number that can only be multiplied by 1 and itself.
What is a prime number?
The equation 5 x 7 =35 can mean:
(choose 1)
35 rulers and 7 rulers put together.
35 pencils are 7 times as many as the 5 pencils at the green table.
35 markers are 5 markers less than 7 markers.
5 erasers split into 7 groups is 35 erasers.
What is 35 pencils are 7 times as many as the 5 pencils at the green table?
List all the factors of 12.
What are 1, 2, 3, 4, 6, 12?
Jacob had 74 milliliters of red paint and 32 milliliters of yellow paint. He mixed all of the paint together to make orange. How many milliliters of orange paint does he have now?
What is 106 milliliters of paint?
6x10=___
60
A number that has MORE factors than 1 and itself.
What is a composite number?
write and solve a multiplication equation.
What is 11 x 3 = 33 years old?
List all the factors of 5.
What are 1 and 5?
Jacob has a stuffed cat that has a mass of 67 grams. A real cat has a mass of 67 kilograms. Which is a greater mass? How do you know?
What is
A real cat has a greater mass.
We know this because kilograms are a larger unit of measurement than grams. It takes 1000 grams to make 1 kilogram.
So, a real cat with a mass of 67 kilograms is much heavier than a stuffed cat with a mass of 67 grams.
Sandra made this arrangement of cards (see chart). She wants to know what other unique arrangements she can make with the same number of cards. Record the dimensions of other arrangements Sandra could make.
What is
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
List at least two multiples of 5.
What is 10, 15, 20, 25, 30, 35, 40,45,...?
Mrs. Lopez has a car that is a little over 4 meters long. What could be the length of her car in centimeters?
What is
A meter is 100 centimeters long.
So, if Mrs. Lopez's car is a little over 4 meters long, it would be a little over 400 centimeters long?
Casey drew this sequence of shapes (see chart).
Describe the pattern you see in the sequence.
Draw the next shape in the sequence.
What is
adding one to each row?
see picture on chart.
16 is a ___________ number. Because _________________________
What is a composite number because it has multiple factors (1,16,2,8,4)?
Jamal bought a book and a CD. The book cost $14. The CD cost $7. How many times more than the CD did the book cost?
What is 2 times?
List at least two multiples of 12.
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
Mei says 78 is a prime number. Ying says 78 is a composite number. Who do you agree with? Explain your reasoning.
What is
Ying is correct. 78 is a composite number?
A prime number has only two factors: 1 and itself. A composite number has more than two factors.
78 can be divided evenly by 1, 2, 3, 6, 13, 26, 39, and 78. Since it has more than two factors, 78 is a composite number.
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
A small box of raising has a mass of 15 grams. A large box of raising has a mass that is 7 times as much as the small box. What is the mass of the large box of raisins?
What is
o find the mass of the large box of raisins, we need to multiply the mass of the small box by 7:
15 grams * 7 = 105 grams?
Therefore, the large box of raisins has a mass of 105 grams.
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