Question

Mark wrote the highest score he made on his new video game as the product 70x6,000.use the associative and communicative properties to show how mark can calculate this product mentally

Answer 1

just multiply 6x7 first

6*7 = 42

 then count the total number of 0's

 there are 4 of them so add 4 0's to the end of 42 to get 420,000

Answer 2

Answer:

42,000

Step-by-step explanation:

The given score is:

70 × 6,000

= 7 × 10 × 6 × 1000    

= (7 × 10) × (6 × 1000)    

= 7 × (10 × 6) × 1000    {Using Associative Property}

= 7 × (6 × 10) × 1000    {Using Commutative Property}

= (7 × 6) × (10 × 1000)    {Using Associative Property}

= 42 × 1000

= 42,000

Associative Property tells that it does not matter how the numbers are grouped, all gives the same result.

For Example:

(a x b) x c = a x (b x c) = (a x c) x b

Commutative Property states that two numbers can be multiplied in any order, all gives the same result.

Example: a × b = b × a