answersLogoWhite

0


Best Answer

Suppose you were trying to multiply 17 x 5 x 2. The associative property states that (17 x 5) x 2 = 17 x (5 x 2) The second one is easier to do in your head.

User Avatar

Wiki User

8y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: How does the associative property help you multiply mentally?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Related questions

How can associative property of multiplication can help solve math problems mentally?

You can do the easy bits first. Thus, to calculate 7*5*2, instead of doing 35*2 = 70, you can calculate 7*10 = 70. By itself, the associative property is not as useful as it is in combination with the commutative and distributive properties.


How do the commutative and associative properties of multiplication could help evaluate the product of 5 multiplied by 17 multiplied by 2 mentally?

5*2 is 10 and 10*17 is 170


How do commutative and associative properties help solve 5x17x2?

5*17*2 The commutative property allows yu to swap the 17 and 2: = 5*2*17 The associative property allows you to group 5 and 2 to evaluate first = (5*2)*17 = 10*17 = 170


Which property would help you solve 42 15 28 mentally because you would add 42 and 28 first then add 15?

the property says that a+b+c is the same as a+c+b and it is the commutative property of addition.


How does associative property of multiplication help to calculate products mentally?

For example, evaluate 17*5*20: Method 1: (17*5)*20 = 85*20 = 1,700. Method 2: 17*(5*20) = 17*100 = 1,700. Notice that by first multiplying 5*20 to get 100, the calculation is easy to do in your head. You can also use the commutative property to rearrange a question: 5*21*4 = 5*4*21 = 20*21 = 420


How you can make 10 to help you add 4 9?

4 = 3 + 1 so 4 + 9 = (3 + 1) + 9 Then, by the associative property, = 3 + (1 + 9) = 3 + 10 = 13


How can knowing the multiplication properties help you evaluate 5 times 20 times 63?

According to the associative property when more than two numbers are multiplied, the order in which the numbers are multiplied will give the same product.


If Mrs. Larsen's class collected 137 cans and Mr. Schmidt's class collected 87 cans which property did you use to help subtract mentally?

rounding


How can family therapy help the mentally retarded?

Family therapy can help relatives of the mentally retarded develop coping skills.


How is fimding the Area of a rectangle related to Distributive Property?

It is not. You simply multiply length x width.


How would you use associative property of multiplication to help me solve four multiplied by 25multiplied by 27?

You are free to choose whether to multiply first the left part: (4 x 25) x 27 or the right part: 4 x (25 x 27). Multiplying the left part first is easier; 4 x 25 is 100, and multiplying by 100 can easily be done in your head.


How are the commutative and associative Properties helpful?

They are useful in speeding up basic arithmetic calculations.The properties allow you to rearrange the arguments of a calculation and the order in which the operations are carried out. So, for example,(5 + 13) + 15 = (13 + 5) + 15 [using the commutative property]= 13 + (5 + 15) [using the associative property]= 13 + 20 = 33.