Rounding Numbers to the 100 Thousands Place

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Presentation transcript:

Rounding Numbers to the 100 Thousands Place Copyright © 2013 Kelly Mott

Rounding Part 1: Lesson Part 2: Online Practice Copyright © 2013 Kelly Mott

FOCUS QUESTION: What does it mean to round a number? Copyright © 2013 Kelly Mott

Rounding When you round a number you tell about how many or about how much. Rounding does not give an exact amount. How many cookies are in the cookie jar? Answer: There are about 20 cookies in the cookie jar. Copyright © 2013 Kelly Mott

FOCUS QUESTION: How do I decide what to round to? Copyright © 2013 Kelly Mott

When you round a number you can do the following: You can look at a number line to see what number your number is closer to. You can follow the rounding rules to help you round a number. Copyright © 2013 Kelly Mott

Rounding with a Number Line Copyright © 2013 Kelly Mott

Rounding to the Nearest 10 Copyright © 2013 Kelly Mott

Round to the Nearest 10 You can use a number line to round numbers. Round 32 to the nearest ten: 32 is closer to __________, so it rounds to ___________. 30 40 Copyright © 2013 Kelly Mott

Round to the Nearest 10 Round 66 to the nearest ten: 66 is closer to __________, so it rounds to ___________. 60 70 Copyright © 2013 Kelly Mott

Round to the Nearest 10 Round 114 to the nearest ten: 114 is closer to __________, so it rounds to ___________. 110 120 Copyright © 2013 Kelly Mott

Round to the Nearest 10 Round 189 to the nearest ten: 114 is closer to __________, so it rounds to ___________. 180 190 Copyright © 2013 Kelly Mott

Rounding to the Nearest 100 Copyright © 2013 Kelly Mott

Round to the Nearest 100 You can use a number line to round numbers. Round 857 to the nearest hundred: 857 is closer to __________, so it rounds to ___________. 900 600 700 800 Copyright © 2013 Kelly Mott

Round to the Nearest 100 Round 612 to the nearest hundred: 612 is closer to __________, so it rounds to ___________. 900 600 700 800 Copyright © 2013 Kelly Mott

Round to the Nearest 100 Round 788 to the nearest hundred: 788 is closer to __________, so it rounds to ___________. 900 600 700 800 Copyright © 2013 Kelly Mott

Round to the Nearest 100 Round 735 to the nearest hundred: 735 is closer to __________, so it rounds to ___________. 900 600 700 800 Copyright © 2013 Kelly Mott

Does this make sense so far? Copyright © 2013 Kelly Mott

Rounding Rules Copyright © 2013 Kelly Mott

Rounding to the Nearest 10 Copyright © 2013 Kelly Mott

Rounding Without a Number Line RULES FOR ROUNDING Round to the nearest ten: Underline the number in the place value you will round. 2. Circle the number to the right of the underlined number. 78 Use the rounding pyramid: Underlined number rounds up one Add the zeros Underlined number stays the same Add the zeros 9 4 8 3 2 7 1 6 5 4. Any digit to the left of the underlined digit stays the same. Copyright © 2013 Kelly Mott

You can use this poem to help you round numbers: Find your number. Look right next door. 4 or less just ignore. 5 or more, add 1 more. Copyright © 2013 Kelly Mott

15 Rounding Practice 1: Round to the nearest ten: RULES FOR ROUNDING Round to the nearest ten: Underline the number in the place value you will round. 2. Circle the number to the right of the underlined number. 15 Use the rounding pyramid: Underlined number rounds up one Add the zeros Underlined number stays the same Add the zeros 9 4 8 3 2 7 1 6 5 4. Any digit to the left of the underlined digit stays the same. Copyright © 2013 Kelly Mott

33 Rounding Practice 2: Round to the nearest ten: RULES FOR ROUNDING Round to the nearest ten: Underline the number in the place value you will round. 2. Circle the number to the right of the underlined number. 33 Use the rounding pyramid: Underlined number rounds up one Add the zeros Underlined number stays the same Add the zeros 9 4 8 3 2 7 1 6 5 4. Any digit to the left of the underlined digit stays the same. Copyright © 2013 Kelly Mott

228 Rounding Practice 3: Round to the nearest ten: RULES FOR ROUNDING Round to the nearest ten: Underline the number in the place value you will round. 2. Circle the number to the right of the underlined number. 228 Use the rounding pyramid: Underlined number rounds up one Add the zeros Underlined number stays the same Add the zeros 9 4 8 3 2 7 1 6 5 4. Any digit to the left of the underlined digit stays the same. Copyright © 2013 Kelly Mott

3,614 Rounding Practice 4: Round to the nearest ten: RULES FOR ROUNDING Round to the nearest ten: Underline the number in the place value you will round. 2. Circle the number to the right of the underlined number. 3,614 Use the rounding pyramid: Underlined number rounds up one Add the zeros Underlined number stays the same Add the zeros 9 4 8 3 2 7 1 6 5 4. Any digit to the left of the underlined digit stays the same. Copyright © 2013 Kelly Mott

32,576 Rounding Practice 5: Round to the nearest ten: RULES FOR ROUNDING Round to the nearest ten: Underline the number in the place value you will round. 2. Circle the number to the right of the underlined number. 32,576 Use the rounding pyramid: Underlined number rounds up one Add the zeros Underlined number stays the same Add the zeros 9 4 8 3 2 7 1 6 5 4. Any digit to the left of the underlined digit stays the same. Copyright © 2013 Kelly Mott

Does this make sense so far? Copyright © 2013 Kelly Mott

Rounding to the Nearest 100 Copyright © 2013 Kelly Mott

215 Rounding Practice 1: Round to the nearest hundred: RULES FOR ROUNDING Round to the nearest hundred: Underline the number in the place value you will round. 2. Circle the number to the right of the underlined number. 215 Use the rounding pyramid: Underlined number rounds up one Add the zeros Underlined number stays the same Add the zeros 9 4 8 3 2 7 1 6 5 4. Any digit to the left of the underlined digit stays the same. Copyright © 2013 Kelly Mott

563 Rounding Practice 2: Round to the nearest hundred: RULES FOR ROUNDING Round to the nearest hundred: Underline the number in the place value you will round. 2. Circle the number to the right of the underlined number. 563 Use the rounding pyramid: Underlined number rounds up one Add the zeros Underlined number stays the same Add the zeros 9 4 8 3 2 7 1 6 5 4. Any digit to the left of the underlined digit stays the same. Copyright © 2013 Kelly Mott

3,481 Rounding Practice 3: Round to the nearest hundred: RULES FOR ROUNDING Round to the nearest hundred: Underline the number in the place value you will round. 2. Circle the number to the right of the underlined number. 3,481 Use the rounding pyramid: Underlined number rounds up one Add the zeros Underlined number stays the same Add the zeros 9 4 8 3 2 7 1 6 5 4. Any digit to the left of the underlined digit stays the same. Copyright © 2013 Kelly Mott

13,854 Rounding Practice 4: Round to the nearest hundred: RULES FOR ROUNDING Round to the nearest hundred: Underline the number in the place value you will round. 2. Circle the number to the right of the underlined number. 13,854 Use the rounding pyramid: Underlined number rounds up one Add the zeros Underlined number stays the same Add the zeros 9 4 8 3 2 7 1 6 5 4. Any digit to the left of the underlined digit stays the same. Copyright © 2013 Kelly Mott

51,318 Rounding Practice 5: Round to the nearest hundred: RULES FOR ROUNDING Round to the nearest hundred: Underline the number in the place value you will round. 2. Circle the number to the right of the underlined number. 51,318 Use the rounding pyramid: Underlined number rounds up one Add the zeros Underlined number stays the same Add the zeros 9 4 8 3 2 7 1 6 5 4. Any digit to the left of the underlined digit stays the same. Copyright © 2013 Kelly Mott

Does this make sense so far? Copyright © 2013 Kelly Mott

Rounding to the Nearest 1000 Copyright © 2013 Kelly Mott

2,415 Rounding Practice 1: Round to the nearest thousand: RULES FOR ROUNDING Round to the nearest thousand: Underline the number in the place value you will round. 2. Circle the number to the right of the underlined number. 2,415 Use the rounding pyramid: Underlined number rounds up one Add the zeros Underlined number stays the same Add the zeros 9 4 8 3 2 7 1 6 5 4. Any digit to the left of the underlined digit stays the same. Copyright © 2013 Kelly Mott

1,233 Rounding Practice 2: Round to the nearest thousand: RULES FOR ROUNDING Round to the nearest thousand: Underline the number in the place value you will round. 2. Circle the number to the right of the underlined number. 1,233 Use the rounding pyramid: Underlined number rounds up one Add the zeros Underlined number stays the same Add the zeros 9 4 8 3 2 7 1 6 5 4. Any digit to the left of the underlined digit stays the same. Copyright © 2013 Kelly Mott

13,581 Rounding Practice 3: Round to the nearest thousand: RULES FOR ROUNDING Round to the nearest thousand: Underline the number in the place value you will round. 2. Circle the number to the right of the underlined number. 13,581 Use the rounding pyramid: Underlined number rounds up one Add the zeros Underlined number stays the same Add the zeros 9 4 8 3 2 7 1 6 5 4. Any digit to the left of the underlined digit stays the same. Copyright © 2013 Kelly Mott

39,150 Rounding Practice 4: Round to the nearest thousand: RULES FOR ROUNDING Round to the nearest thousand: Underline the number in the place value you will round. 2. Circle the number to the right of the underlined number. 39,150 Use the rounding pyramid: Underlined number rounds up one Add the zeros Underlined number stays the same Add the zeros 9 4 8 3 2 7 1 6 5 4. Any digit to the left of the underlined digit stays the same. Copyright © 2013 Kelly Mott

103,718 Rounding Practice 5: Round to the nearest thousand: RULES FOR ROUNDING Round to the nearest thousand: Underline the number in the place value you will round. 2. Circle the number to the right of the underlined number. 103,718 Use the rounding pyramid: Underlined number rounds up one Add the zeros Underlined number stays the same Add the zeros 9 4 8 3 2 7 1 6 5 4. Any digit to the left of the underlined digit stays the same. Copyright © 2013 Kelly Mott

Does this make sense so far? Copyright © 2013 Kelly Mott

Rounding to the 10 Thousands Copyright © 2013 Kelly Mott

Round to the Nearest Ten Thousand 18,200 11,400 143,466 106,640 Copyright © 2013 Kelly Mott

Round to the Nearest Ten Thousand 52,109 16,419 701,466 167,640 Copyright © 2013 Kelly Mott

Does this make sense so far? Copyright © 2013 Kelly Mott

Rounding to the 100 Thousands Copyright © 2013 Kelly Mott

Round to the Nearest 100 Thousand 352,200 161,400 5,143,466 8,706,640 Copyright © 2013 Kelly Mott

Round to the Nearest 100 Thousand 337,488 169,859 7,450,466 2,247,640 Copyright © 2013 Kelly Mott

Does this make sense so far? Copyright © 2013 Kelly Mott

Copyright © 2013 Kelly Mott

Online Practice: Copyright © 2013 Kelly Mott