Vocab
The sign that shows that two things are the same amount.
What is the equals sign?
An array that shows 5 rows of 7
What is:
xxxxxxx
xxxxxxx
xxxxxxx
xxxxxxx
xxxxxxx
Kaitlyn shares 12 apples with 4 friends. How many apples do they each get?
What is 3 apples?
12/4=3
Is 2x5=5x2? Explain why or why not.
Yes, they are equal because they both have the same factors and they both have a product of 10.
The numbers that you multiply.
What are factors?
An array that shows 6 rows of 3
What is:
ooo
ooo
ooo
ooo
ooo
ooo
Mrs. Fleming bought a package of 32 M&M's. She split them equally between herself, her husband, and her two children. How many M&M's did each person get?
What is 8 M&M's?
32/4=8
The difference between an equation and an expression.
What is an equation has an answer and an expression does not?
The answer to a multiplication equation.
What is the product?
How many rows are in this array?
xxxxx
xxxxx
xxxxx
xxxxx
What is 4 rows?
Children sit in 2 rows of 9 on the carpet for math time. Erin says, “We make 2 equal groups.” Vittesh says, “We make 9 equal groups.” Who is correct? Explain how you know using models, numbers, and words.
Both people are correct. 2x9=9x2
Show (with your body) the difference between a row and a column.
(check visuals)
The picture that arranges items in rows and columns.
What is an array?
Write the multiplication and division equations for this array:
0000
0000
0000
What is 3x4=12 and 12/3=4
There are 8 apples, 7 oranges and 9 bananas in a fruit bowl. The fruit is split between 12 people. How many pieces of fruit can they each have?
8+7+9=24
24/12=2
Draw two arrays and use them to explain why the commutative property is always true.
The commutative property is always true because both arrays are made from the same factors and equal the same product.
(check drawings)
The property that tells me that I can multiply factors in any order and always get the same product.
What is the commutative property?
Write two multiplication equations and two division equations that represent this array:
ooooooooo
ooooooooo
ooooooooo
ooooooooo
What is 4x9=36
9x4=36
36/4=9
36/9=4
Rose and her 3 friends each have 5 pencils. How many pencils do they have altogether? If they put them into two bins, how many will be in each bin?
What is 20 pencils? What is 10 pencils in each bin?
1+3=4
4x5=20
20/2=10
The only time when you will not have a related fact for a multiplication or division fact.
What is a square number. (An array of 3x3 will be 3x3 no matter which way you turn it.)