Prime/Composite
Is 19 prime or composite? How do you know?
19 is prime because it only has one set of factor pairs (two factors).
List four multiples of 6
12, 18, 24, 30, 36, 42, 48
Anya is 9 years old. Ms. Bev is six times as old as Anaya. How old is Ms. Bev?
Ms. Bev is 54 years old.
Kenzie is a little over 1 meter tall. Which could be her height in cm?
12 cm 119 cm 1,004 cm
119 cm
Chandler says 30 is a prime number. Clayton says that 30 is a composite number. Who is correct? Why?
Clayton is correct because 30 has more than two factors which include: 1, 2, 3, 5, 6, 10, 30
Is 21 prime or composite? How do you know?
21 is composite because it has more than one factor pair (two factors). The factors are 1, 3, 7, 21.
What are all the factors for 17
1 and 17
Holden found 12 ladybugs in the window. This is four times as many ladybugs as he found in the garden. How many ladybugs were in the garden?
3 ladybugs
1 liter = __________ milliliters
1,000 millileters
Which of these numbers are a multiple of 9?
7, 18, 25, 27, 36, 42
18, 27, 36,
What is a prime number? (definition)
A number with only one factor pair (two factors) which include 1 and itself.
List two multiples of 13
26, 39, 52, 65, 78
A small box of tissues has a mass of 12 grams. A large box of tissues has ten times the mass of a small box. What is the mass of the large box of tissues?
120 grams
How many centimeters are in 1 meter?
100 cm
The rule for this patterns is to add 8. Find the missing numbers.
64, 72, 80, _____, _______, _______
88, 96, 104
What is a composite number? (definition)
A number with more than one factor pair (more than two factors).
What are all the factors for 24
1, 2, 3, 4, 6, 8, 12, 24
5 x 4=20
20 + 5=25
There are 25 broken crayons in all.
If the classroom is 5 meters long, how long is the classroom in centimeters?
5 x 100 = 500 cm
Bee has 24 milliliters of red paint. Lynasia has 67 milliliters of orange paint. The two students mixed the paint together. How much paint to do they have all together?
24 + 67 = 91 milliliters
Liam says that 56 is a prime number. Carter says that 56 is a composite number. Who is right? Why?
I agree with Carter that 56 is a composite number because it has more than two factors.
1x56, 2x28, and 7x8
What are the factors for 37
1 and 37
Maverick has 6 markers. He then found 8 more. Alice has ten times as many markers as Maverick. How many markers does Alice have?
140 markers
Which type of linear measurement would you use to measure the length of the classroom? Would you use centimeters or meters?
Meters
Tyler has a stuffed cat that has a mass of 25 grams. He also has a real cat with a mass of 25 kilograms. Which cat has the greater mass? How do you know?
Tyler's real cat as the greater mass.
Kilograms have more mass than grams.
1 kilogram = 1,000 grams so 25 kilograms = 25,000 grams. That is a lot more than 25 grams.