1. How do you round 64 to the nearest 10? Will 64 round to 60 or 70?

2. In this lesson you will learn how to round to the nearest 10 by using base ten blocks.

3. Let’s Review 12345678910 11121314151617181920 21222324252627282930 31323334353637383940 41424344454647484950 51525354555657585960 61626364656667686970 71727374757677787980 81828384858687888990 919293949596979899100

4. Let’s Review Base Ten Blocks OnesTensHundredsThousands

5. ThousandsHundredsTensOnes 2467

6. Let’s Review A Common Mistake Knowing when to round up or round down. It is important to consider the number size and the benchmark numbers when rounding.

7. Let’s Review Core Lesson Rounding - To find a number that is close to a given number. My family drove 323 miles on vacation. We drove about 320 miles.

8. Let’s Review Core Lesson 12345678910 11121314151617181920 21222324252627282930 31323334353637383940 41424344454647484950 51525354555657585960 61626364656667686970 71727374757677787980 81828384858687888990 919293949596979899100 Numbers less than the midpoint round down. Numbers the same as or greater than the midpoint round up.

9. Let’s Review Core Lesson Round 51 to the nearest ten. 51 is between 50 and 60.

10. Let’s Review Core Lesson 12345678910 11121314151617181920 21222324252627282930 31323334353637383940 41424344454647484950 51525354555657585960 61626364656667686970 71727374757677787980 81828384858687888990 919293949596979899100

11. Let’s Review Core Lesson Round 57 to the nearest ten.

12. Let’s Review Core Lesson 12345678910 11121314151617181920 21222324252627282930 31323334353637383940 41424344454647484950 51525354555657585960 61626364656667686970 71727374757677787980 81828384858687888990 919293949596979899100

13. Let’s Review Core Lesson Round 485 to the nearest ten. 485 is between 480 and 490.

14. Let’s Review Core Lesson Round 485 to the nearest ten. 490 100200 300 400

15. Let’s Review Core Lesson Round 64 to the nearest 10 Now I have 6 groups of 10 and 0 ones. 60 70 64 – = 60 64 + = 70 4 6

16. Let’s Review Core Lesson 368 Rounds Up to 370 368 – = 360 368 + = 370 8 2

17. In this lesson you have learned how to round to the nearest 10 by using base ten blocks.

18. Let’s Review Guided Practice 1). Round 167 to the nearest ten. 2). Round 24 to the nearest ten.

19. Let’s Review Extension Activities Prepare digit cards 0 – 9. Turn the cards over and select two digits to create a number. Find this number on a hundreds chart and round to the nearest 10.

20. Let’s Review Extension Activities Create the following numbers with base ten blocks. Round each number to the nearest 10. 78 345 852 124

21. Let’s Review Quick Quiz 1). Round 87 to the nearest 10. 2). Round 472 to the nearest 10.