Final answer:
To check her answer for 213 - 57, Natasha can add the difference to 57, use estimation, or use the inverse operation (adding 57 to the difference).
Step-by-step explanation:
To check the answer for the subtraction problem 213 - 57, Natasha can use the following methods:
- Addition Check: Add the difference (the result of 213 - 57) to 57 and see if the sum is 213.
- Estimation: Round both numbers to the nearest ten and perform the subtraction to see if the estimated result is close to the actual answer.
- Inverse Operation: Apply the inverse operation by adding 57 to the difference, verifying that the result is the original number, 213.
By using these methods, Natasha can confirm the accuracy of her subtraction.