It’s Your Turn!
What is the estimated sum?
Goal:
Goal:
Practice!
Goal: Estimate the sum.
Play this game to estimate sums!
What is the estimated sum? Find the correct addition sentences.
Estimate the sum of 51 + 15.
- 10 + 40 = 50
- 20 + 50 = 70
- 30 + 50 = 80
Sorry, that is not correct. The estimated sum is 50 + 20 = 70.
You got it! 70 is the estimated sum.
Sorry, that is not correct. The estimated sum is 50 + 20 = 70.
Estimate the sum of 76 + 33.
- 80 + 30 = 110
- 10 + 20 = 30
- 30 + 70 = 100
You got it! 110 is the estimated sum.
Sorry, that is not correct. The estimated sum is 80 + 30 = 110.
Sorry, that is not correct. The estimated sum is 80 + 30 = 110.
Estimate the sum of 28 + 67.
- 30 + 80 = 110
- 40 + 20 = 60
- 30 + 70 = 100
Sorry, that is not correct. The estimated sum is 30 + 70 = 100.
Sorry, that is not correct. The estimated sum is 30 + 70 = 100.
You got it! 100 is the estimated sum.
Estimate the sum of 12 + 72.
- 10 + 70 = 80
- 20 + 20 = 40
- 30 + 10 = 40
You got it! 80 is the estimated sum.
Sorry, that is not correct. The estimated sum is 10 + 70 = 80.
Sorry, that is not correct. The estimated sum is 10 + 70 = 80.
Estimate the sum of 39 + 2.
- 10 + 30 = 40
- 0 + 40 = 40
- 20 + 30 = 50
Sorry, that is not correct. The estimated sum is 40 + 0 = 40.
You got it! 40 is the estimated sum.
Sorry, that is not correct. The estimated sum is 40 + 0 = 40.
Summary
Questions answered correctly:
Questions answered incorrectly: