Estimating Practice

Read each problem of the practice. This is a self-check to see what you learned.

Number on a piece of paper 1 - 10. Read each problem, work out the problem on the paper, and write down your answer. Then check your own answers.

If you don't miss any or just 1, that is Great! If you miss only 2 or 3, just look back at the problems you missed to see what you did wrong. If you missed more than 3, go over the lesson again and re-take the quiz until you miss less than 3. Good luck!

1. What is the estimated sum of 13 + 16? ____

2. What is the estimated sum of 37 + 46? ____

3. What is the estimated sum of 237 + 146? ____

4. What is the estimated difference of 67 - 46? ____

5. What is the estimated difference of 641 - 246? ____

6. What is the estimated difference of 493 - 245? ____

7. What is the estimated sum of 345 + 34? ____

8. What is the estimated difference of 483 - 76? ____

9. What is the estimated sum of 312 + 48? A. 300 B. 400 C. 350 D. 360

10. What is the estimated difference of 437 - 23? A. 420 B. 430 C. 400 D. 500