Question

Higher Order Thinking Jamie says

that 19 - 10 is equal to 20 – 10

because both use subtraction. Is Jamie

correct? Explain why or why not.

**1st grade question**

Answer 1

she is wrong 19-10 equals to 9

Explanation:

you subtract 19 from 10 and get 9:)

Answer 2

Answer: Jamie is incorrect

Explanation:

The same number 10 is subtracted from both numbers 19 and 20. There result will only be the same if both numbers are equal.

We compare both numbers;

19 and 20

On the number line 19 comes before 20, which means 20 is greater than 19. Hence the result of subtracting the same number 10 from both of them cannot be the same.

So Jamie is incorrect.