Prime & Composite
What is a number called that can only be multiplied by 1 and itself?
A prime number
Jenna is 9 years old. Her mom is 4 times older than Jenna. How old is her mom?
Her mom is 36 years old. 9x4=36
25 divided by 5 = _________
Solve.
(3x7)+(5x4)= ______
21+20=41
4x10=___
40
What is a number called that can be multiplied by more than one set of factors?
A composite number
Sawyer got candy for Halloween. She got 22 pieces of candy. Her brother got 4 times as much candy as Sawyer. What equation represents how much candy her brother got?
22x4=C (c represents candy)
There are 24 crayons in the box. There are 3 rows in the box. How many crayons are there in each row?
24/3=8 crayons
The blue table has 6 students. Each student has 4 pencils. The red table has 3 students. Each student has 5 pencils.
How many pencils do both groups have total?
4x5=20
3x5=15
20+15=35 pencils total
4x9=____
36
29 is a PRIME or COMPOSITE number because___________________________.
29 is a PRIME number because its only factors are 1 and itself.
Mrs. Smith is 6 times as old as Harper. Harper is 10 years old. How old is Mrs. Smith?
6x10=60 years old
Mrs. Mays had 36 pencils to give her students. Each student got 2 pencils. How many students were in Mrs. Mays class?
36/2=18 students in her class.
Each of the 4 students at the red table has 8 crayons. The class has 5 times as many crayons as the entire red table. How many crayons total does the whole class have?
4x8=32 crayons
32x5=160 crayons
11x______=66
6
25 is a PRIME or COMPOSITE number because ____________________.
25 is a COMPOSITE number because it has more than one set of factors.
Ms. Zablocki bought a book and a video game. The video game cost 3 times as much as the book. The book cost $12. How much did the video game cost?
12x3=$36 for the video game
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
Mrs. Charron has 30 packs of markers. Ms. Zablocki has 3 times as many packs of markers in her class. How many MORE packs of markers does Mrs. Zablocki have than Mrs. Charron?
30x3=90 packs of markers
90-30=60 more more packs of markers
4x_____=28
7
What are all of the factors for the number 18
1, 18, 9, 2, 3, and 6
What is the equation and answer that represents this word problem?
The blue ribbon is 6 inches long. The red ribbon is 5 times longer than the blue ribbon. How long is the red ribbon?
6x5=30 inches
Lilly needed doughnuts for her Halloween party. The doughnuts came in packs of 6. She had 30 kids coming to her party. How many packs of doughnuts will she need?
30/6=5 packs of doughnuts
The blue table has 5 students, and each student has 3 pencils. The yellow table has 5 students, and each student has 5 pencils. After they collected all of the pencils, the teacher divided them evenly among the students at the tables. How many pencils did each student get?
Blue Table= 5x3=15
Yellow Table= 5x5=25
15+25=40
40/10= 4 pencils for each student.
____x9=45
5