2. Estimation Objective: I can apply estimation to numbers.

3. Essential Questions 1.What is estimation? –Estimating is finding close to the correct answer or to find about the correct answer –Sometimes you may see the word round instead of estimate

4. Essential Questions 1.What is estimation? –Estimating is finding close to the correct answer or to find about the correct answer –Sometimes you may see the word round instead of estimate

5. Let’s Practice! Estimate the number 42 to the nearest ten. First, I need to think about the number in the 10’s. 4242 The four is in the tens place

6. Is 42 closer to 40 or to 50? 4050 41 42 43 44 45 47 46 48 49 Why did the biker fall down the hill to 40?

7. Let’s Practice! Estimate the number 76 to the nearest ten. First, I need to think about the number in the 10’s. 7676 The seven is in the tens place

8. Is 76 closer to 70 or to 80? 7080 71 72 73 74 75 77 76 78 79 Why was the biker able to ride down the hill to 80?

9. Let’s practice a few on your white boards. 1) 32 2) 45 3) 91 4) 89 30 50 90

10. Estimation Poem Find your number. Look next door. Less than four, just ignore. Five or more, add one more. Flex your muscles, like a hero, digits to the right turn to zero.

11. Estimation Poem Find your number. Look next door. Less than four, just ignore. Five or more, add one more. Flex your muscles, like a hero, digits to the right turn to zero. Let’s estimate the number 126 to the nearest ten.

12. Estimation Poem Find your number. Look next door. Less than four, just ignore. Five or more, add one more. Flex your muscles, like a hero, digits to the right turn to zero. 126

13. Estimation Poem Find your number. Look next door. Less than four, just ignore. Five or more, add one more. Flex your muscles, like a hero, digits to the right turn to zero. 126

14. Estimation Poem Find your number. Look next door. Less than four, just ignore. Five or more, add one more. Flex your muscles, like a hero, digits to the right turn to zero. 126 The number six is not less than four. Keep going!

15. Estimation Poem Find your number. Look next door. Less than four, just ignore. Five or more, add one more. Flex your muscles, like a hero, digits to the right turn to zero. 126 Six IS five or more! That must mean that I…

16. Estimation Poem Find your number. Look next door. Less than four, just ignore. Five or more, add one more. Flex your muscles, like a hero, digits to the right turn to zero. 126 Always add your number to the number with the arrow! + 1

17. Estimation Poem Find your number. Look next door. Less than four, just ignore. Five or more, add one more. Flex your muscles, like a hero, digits to the right turn to zero. 126 Always add your number to the number with the arrow! + 1 13

18. Estimation Poem Find your number. Look next door. Less than four, just ignore. Five or more, add one more. Flex your muscles, like a hero, digits to the right turn to zero. 126 + 1 130

19. Let’s practice some by using the poem Estimate the numbers to the nearest hundred. 456378517932 Estimate the numbers to the nearest ten. 51472814

20. Let’s think about… Why is it important to learn how to estimate? When do we estimate in real-world situations?