Properties
2 x 4 = 4 x 2 is an example of which multiplication property?
Commutative
Estimate.
25 x 35
30 x 40
1,200
$42,004 x 3
$126,012
41,127 x 23
945,921
Shawn says that the equation (3 x 12) x 7 = (12 x 3) x 7 shows the Associative property of Multiplication. Jake thinks that it shows the Commutative Property of Multiplication. Who is correct?
Jake
12 x 0 = 0 is an example of which multiplication property?
Zero Property of Multiplication
Estimate.
204 x 875
200 x 900
180,000
880,460 x 8
7,043,680
36,219 x 48
1,738,512
A sculptor collects several blocks of granite for his studio. the block weigh 22 lb, 18 lb, 24 lb, 16 lb, and 21 lb, About how many pounds of granite does he bring back to his studio?
20 + 20 + 20 + 20 + 20
About 100 lb
Associative
Estimate.
494 + 519 + 512 + 476 + 538
2,500
$96,801 x 7
677,607
475 x 218
103,550
Haan needs to buy 189 calculators for science camp. Each calculator costs $28. She estimates that she will spend about $6000. Is this a reasonable estimate? Show your work.
Yes. 200 x $30 = $6,000
8 x 1 = 8 is an example of which multiplication property?
Estimate.
$8.97 x 42
$9 x 40
$360
225 x 35
7,875
25,709 x 819
21,055,671
There are 280 orchestra seats available for a musical. If all but 10 seats are sold, will the theater earn $50,000? Each seat costs $191.
Yes. $191 x 270 = $51,570
3 x (2 x 5) = (3 x 2) + (3 x 5) is an example of which multiplication property?
Distributive
Estimate.
$51.50 x 379
$50 x 400
$20,000
136 x 604
8,704
1090 x 977
1,064,930
Earth is approximately 585 times as far away from Mars as it is from the Moon. If the distance from the Earth to the Moon is 384,400 km, what is its distance to Mars?
585 x 384,400 km
224,874,000 km