True/False (prove it)
9 x 7 = 7 x 9
True because of the commutative property of multiplication (any same 2 factors multiplied together will have the same product)
8 x 6 = 48, so
48 -- 8 = ?
6 because of the inverse relationship between multiplication and division.
A classroom has 5 table groups with 4 kids sitting at each group. How many kids are in the classroom?
20
Select ALL the expressions that equal 20.
2 x 10
3 x 4
4 x 5
5 x 6
2 x 10 and 4 x 5
3 x 5.
What is 15?
False because they have different products.
6 x 9 = 54, what division problem could also be in this fact family?
54 -- 6 = 9 or
54 --9 = 6
Maria has the following plants in her garden:
6 rows of tomato plants with 3 tomato plants in each row
8 rows of pepper plants with 4 pepper plants in each row.
How many plants does Maria have in her garden?
6 x 3 = 18
8 x 4 = 32
32 + 18 = 50 plants
Select ALL the expressions that belong in a fact family with 4 x 7 = 28
7 x 4 = 28
28 x 4 = 7
28 -- 7 = 4
7 x 4 = 28 and 28 -- 7 = 4
4 x 8.
What is 32?
3 x 8 = 6 x 4
True because they have the same product. They both equal 24.
What unknown number makes this equation true?
42 = 7 x ?
6
There are 28 girls and 35 boys in a gym class.
The teacher puts each kid on a team.
There are 9 teams.
Each team has the same number of kids.
How many kids are on each team?
7
There are 24 students in the class. The teacher wants to put them into equal groups with no students left out
Select ALL the ways the teacher can group them.
3 groups, 4 groups, 5 groups, 6 groups, 7 groups
3 groups, 4 groups, 6 groups
6 x 9.
What is 54.
4 x 7 can be solved by doing the distributive property of multiplication below:
(4x5) + (4x2)
True because 4x7 can bebroken down into two simpler problems. 7 can be decomposed into 5 + 2.
Decide whether this expression is equal to
6 x (8 + 10) .
(6 x 8) + (6 x 10) Yes or No?
Yes
Ivan has 4 boxes of crayons. Each box has 8 colors.
Each box has 5 crayons of each color.
What equation can be used to find the number of crayons Ivan has altogether?
4 x 8 x 5 = c
Select ALL the ways you can divide 18 cookies into equal groups with none left over.
2 groups, 3 groups, 5 groups, 7 groups, 8 groups
2 groups, 3 groups
8 x 7.
What is 56?
3 x 4 = 12 -- 6
False because 3 x 4 = 12,
but 12 -- 6 = 2
Which equation has the same unknown value as
20 -- 5 = ?
A. ? -- 20 = 5
B. 20 x ? = 5
C. 5 x ? = 20
C
Laynie has 81 centimeters of yarn. She cuts the yarn into pieces that are 9 centimeters long.
How many pieces of yarn does Laynie have?
9
Carrie has 24 gumballs that she wants to put into bags so that there are the same number of gumballs in each bag. She claims all of the methods below will work. Which ones are correct?
A. 3 bags with 8 gumballs in each bag.
B. 4 bags with 6 gumballs in each bag.
C. 8 bags with 4 gumballs in each bag.
D. 12 bags with 2 gumballs in each bag.
A, B, D
9 x 9
What is 81?