Kiera used place value and the distributive property to find the product of 12 and 597. Her work is shown below. 12 (597) = 12 (500 + 90 + 7) = 12 (500) + (90) (7) = 6000 + 630 = 6,630 What is Kiera's error?

(90) (7) ⇒ the error was multiplying 90 and 7.

Step-by-step explanation:

12 (597) = 12 (500 + 90 + 7)

= 12 (500) + (90) (7)

= 6000 + 630

= 6,630

The part in bold shows where the error is. It was not correct to multiply 90 and 7.

The process was to proceed as follows:

12 (597) = 12 (500 + 90 + 7)

= 12 (500) + 12 (90) + 12 (7)

= 6000 + 1080 + 84

= 7,164