24
Dustin earns $30 for each lawn he mows. How much does Dustin earn for 3 lawns?
$90
5 × 20
100
What is 144÷12?
12
If you buy 3 books at $15 each, how much do you spend?
45
72
How can you use the Associative Property of Multiplication to find the product 2 and 30?
: I can rewrite 30 as 10 × 3 and then group the factors. So, I multiply 2 × 10 first before multiplying that product with 3
Find the product of 18×10
180
What is 56÷8
7
Which equation shows the associative property of multiplication?
a. (2+3)+4=2+(3+4)(2+3)+4=2+(3+4)
b. 5×(6+7)5×(6+7)
c. 3×5=5×33×5=5×3
d. 7+8=8+77+8=8+7
a. (2+3)+4=2+(3+4)(2+3)+4=2+(3+4)
3 × 50 =( × ) + ( × ) + ( × ) + ( × ) + ( × ) = 30 + + + +
3 × 50 =(3 ×10 ) + (3 ×10 ) + (3 ×10 ) + (3 ×10 ) + (3 ×10 ) = 30 + 30 + 30 + 30 +30
7 × 8 = 7 × (2 × ■ )
4
10. What is the result of 8×7?
a. 54
b. 56
c. 64
d. 48
b. 56
72÷9=
8
Using the associative property, how would you simplify (2×3)×4(2×3)×4?
a. 2×(3×4)2×(3×4)
b. 2+3+42+3+4
c. 3×(2+4)3×(2+4)
d. 2×3+42×3+4
a. 2×(3×4)2×(3×4)
Rachel is hanging photos on a wall. She hangs 20 photos in each of 4 rows. How many photos does Rachel hang?
80
Find the product 7 × 40 by rewriting 40 as a product of 10 and a number
7 × (10 × 4) = (7 × 10) × 4 = 70 × 4 = 280
What is 100÷25?
4
What is the result of 56÷7?
a. 6
b. 7
c. 8
d. 9
c. 8
If (2×5)×3=30(2×5)×3=30, what property is being used?
Robin says, “I can find 6 × 9 by multiplying 4 × 9 and doubling it.” Does her statement make sense? Justify your answer.
No, Robin can find 6 x 9 by multiplying 3 x 9 and doubling it. if she finds 4 x 9 and double it, sh is finding 8 x 9
jess finds 8 x 70 using 8 x (7 + 10). is Jess correct? Explain
No, Jess rewrote 70 incorrectly as the sum of two #'s that do not equal 70. He should write 70 as 7 x 10; (7 x 10)
Which equation demonstrates the distributive property?
a. 6×(4+2)=6×4+6×26×(4+2)=6×4+6×2
b. 5×6=6×55×6=6×5
c. (3×4)×5=3×(4×5)(3×4)×5=3×(4×5)
d. 2+3=3+22+3=3+2
a. 6×(4+2)=6×4+6×26×(4+2)=6×4+6×2
If a tank holds 500 liters and is filled at a rate of 25 liters per minute, how long will it take to fill?
20
A car travels 60 miles per hour for 2 hours. How far does it go?
120