Number Lines
Equal Expressions
Word Problems
Associative Property
Using Basic Facts
100
Mrs. Peters has 6 packs of crayons. Each package has 30 crayons in it. Which number line shows the correct way to solve the problem?
A. shows the intervals going up by 30s and six hops to land on the answer 180 crayons.
100
Which expressions are equal to 6 x 30. choose all that are equal.
A. 6 x (3 x 10)
B. 3 x (3 x 30)
C. (6 x 3) x 10
D. 18 x 10
A, C & D are correct
A. 6 x (3 x 10) = 180
B. 3 x (3 x 10) = 90
C. (6 x 3) 10 = 180
D. 18 x 10 = 180
100
Lena has 7 mega-packs of stickers each package has 60 stickers. How many stickers does Lena have all together?
420 stickers
7 x 60 = 7 x (6 x 10)
7 x 60 = (7 x 6) x 10
7 x 60 = 42 x 10
7 x 60 = 420
100
What number would you use to fill in the blank for the associative property and then find the final answer.
5 x 30 = 5 x (___ x 10)
blank = 3
final answer = 150
100
Use a basic fact to find 9 x 40. Be sure to show your work.
9 x 4 = 36
9 x 40 = 360
200
Which number line accurately represents the problem 3 x 70?
A. shows the intervals going up by 70 and 3 hops stopping on 210.
200
Which expressions are equal to 4 x 30. choose all that are equal.
A. 12 x 10
B. (4 x 3) x 10
C. 3 x (40 x 10)
D. 3 x (4 x 10)
A, B & D are correct
A. 12 x 10 = 120
B. (4 x 3) x 10 = 120
C. 3 x (40 x 10) = 1,200
D. 3 x (4 x 10) = 120
200
Olivia has 4 pieces of candy for each of her 20 classmates. How many pieces of candy does she have all together?
80 pieces of candy
4 x 20 = 4 x (2 x 10)
4 x 20 = (4 x 2) x 10
4 x 20 = 8 x 10
4 x 20 = 80
200
Fill in the blanks for the associative property and find the final answer.
6 x 90 = ____ x (9 x 10)
blank = 6
final answer = 540
200
Show the basic fact and the final answer for the following problem.
4 x 50
basic fact - 4 x 5 = 20
final answer - 4 x 50 = 200
300
Mary made this number line to show 30 x 5
What did she do incorrectly?
She made too many hops. She should have stopped at 150.
300
Choose the expression that makes the following equation true.
6 x 50 = _____________
A. (6 x 5) + 5
B. 3 x 3 x 50
C. 30 x 5
D. 11 x 10
C is correct
6 x 50 = 6 x (5 x 10)
6 x 50 = (6 x 5 ) x 10
6 x 50 = 30 x 10
6 x 50 = 300
300
Alexander has 7 boxes of cards. Each box holds 50 cards. How many cards does he have in all?
350 cards
7 x 50 = 350
300
To solve 8 x 30 Joey wrote
8 x (30 x 10) = (8 x 30) x 10.
What mistake did he make?
He should have split up the 30 into 3 x 10
not 30 x 10
300
Greg solved the following problem incorrectly. What did he do wrong?
7 x 7 = 42
7 x 70 = 420
7 x 7 = 49 not 42
so 7 x 70 = 490
400
Make a number line to show 4 x 60 and find the final answer.
4 x 60 = 240
400
Fill in the blank with the number the makes the equation true.
9 x 70 = 9 x (7 x 10)
9 x 70 = (9 x 7) 10
9 x 70 = _____ x 10
63
400
The teachers need 4 boxes of green folders and 2 boxes of yellow folders. Each box holds 30 folders. How many folders do the teachers need to buy?
180 folders
2 x 30 = 60 and 4 x 30 = 120
60 + 120 = 180
400
Fill in the blanks to make the associative property complete and then solve.
9 x 80 = 9 x (8 x 10)
9 x 80 = (9 x 8) x 10
9 x 80 = _____ x 10
9 x 80 =
blank = 72
final answer = 720
400
Find the basic fact and solve the problem
2 x 20
2 x 2 = 4
2 x 20 = 40
500
Make a number line to show the answer to this problem.
5 x 20
5 x 20 = 100
500
Fill in the blank with the number that makes the equation true.
4 x 70 = ______ x 10
28
500
Abby needs 5 pieces of red string and 3 pieces of green string to make a bracelet. If she needs to make 40 bracelets how many total pieces of string will she need?
320 pieces of string
(5 + 3) x 40 = 8 x 40 = 320
500
Write the associative property to solve the problem and find the final answer for the following problem.
7 x 80
7 x 80 = 7 x (8 x 10) = (7 x 8) x 10 = 560
500
Find the basic fact and the final answer.
7 x 80
basic fact - 7 x 8 = 56
final answer 7 x 8 = 560