Factors
What are factors of 15?
1,3,5, and 15.
What are the first 5 multiples of 3?
3, 6, 9, 12, 15
What is the meaning of prime?
A number that only has 2 factors. (1 and itself)
How many lines of symmetry does a rectangle have?
What is the perimeter of a square with a side of 4 in?
Add up all 4 side. length + length + width + width
16 in.
Is 21 a factor of 21? What are the factors of 21?
Yes, 1 x 21= 21
The factors of 21 are 1, 3, 7, and 21.
Ms. Serangeli says that 9, 12, 16, and 20 are all multiples of 4. True or False. Explain.
False. 9 is not a multiple of 4.
How many sides does an equilateral triangle have and how many lines of symmetry?
3 sides and 1 line of symmetry
Explain how you find the area of a rectangle.
Multiply the length times the width.
Draw all the possible arrays for 20
1 x 20 and 20 x 1
2 x 10 and 10 x 2
4 x 5 and 5 x 4
Do you need to add or multiply? Explain.
Ms. Kot read for 10 minutes. Ms. Serangeli read 6 times as long. How many minutes did Ms. Serangeli read for? Bonus: What is her favorite book?
Multiply:
10 x 6
Ms. Serangeli read for 60 minutes or one hour.
Give the first 10 multiples of 6. Which of those numbers are prime?
6, 12, 18, 24, 30, 36, 42, 48, 54, 60
None, all of the numbers are composite
How many sides does a hexagon, heptagon, and decagon have together?
23 sides
If a rectangle has a length of 2 centimeters and a width of 5 centimeters, what is the perimeter?
14 centimeters
What are the factors of 60?
1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30 and 60.
How many seconds total are there in 6 hours and 7 minutes?
22,020 seconds
Ms. Kot has 24 candies. She wants to divide them into groups of 6. How many groups can she make? Is 24 a prime or composite number?
4 groups
6x4=24
24 is composite number
What is a shape with 4 sides called?
Quadrilateral
If a rectangle has a length of 4 feet and a width of 6 feet, what is the area?
24 square feet
What are factors of 72
1, 2, 3, 4, 6, 8, 9, 12, 18, 24, and 72.
Ms. Kot drove for 3 hours on every weekday to school. At the end of the school week. How many minutes did she drive?
900 minutes
Ms. Serangeli brings in a box of 48 fidgets. A group of children ran to the box to take fidgets. They each took 4 fidgets from the box. How many children took fidgets from the box? Is 48 a prime or composite number?
How many fidgets would each student in Ms. Kot's class of 24 receive if each student were take equally?
12 toys
48 is composite
2 fidgets each
What shape has 9 sides? How many lines of symmetry does this shape have?
Nonagon, 9 lines of symmetry.
If the area of the rectangle is 18 square inches and the length is 6 inches. What is the width?
3 inches
How did you solve?