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Rounding Numbers to the 100 Thousands
Place
Copyright © 2013 Kelly Mott
RoundingPart 1: LessonPart 2: Online Practice
Copyright © 2013 Kelly Mott
FOCUS QUESTION: What does it mean to
round a number?
Copyright © 2013 Kelly Mott
• When you round a number you tell about how many or about how much.
• Rounding does not give an exact amount.
Copyright © 2013 Kelly Mott
Rounding
How many cookies are in
the cookie jar?
Answer: There are about 20 cookies in the cookie jar.
FOCUS QUESTION: How do I decide what to
round to?
Copyright © 2013 Kelly Mott
When you round a number you can do the following:
1. You can look at a number line to see what number your number is closer to.
2. 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 ___________.
600 900700 800
Copyright © 2013 Kelly Mott
Round to the Nearest 100
• Round 612 to the nearest hundred:
• 612 is closer to __________, so it rounds to ___________.
600 900700 800
Copyright © 2013 Kelly Mott
Round to the Nearest 100
• Round 788 to the nearest hundred:
• 788 is closer to __________, so it rounds to ___________.
600 900700 800
Copyright © 2013 Kelly Mott
Round to the Nearest 100
• Round 735 to the nearest hundred:
• 735 is closer to __________, so it rounds to ___________.
600 900700 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
78
1. Underline the number in the place value you will round.
2. Circle the number to the right of the underlined number.
Round to the nearest ten:
3. Use the rounding pyramid:
RULES FOR ROUNDING
1. Underlined number rounds up one
2. Add the zeros
1. Underlined number stays the same
2. Add the zeros
5
7
84
601
23
9
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
Rounding Practice 1:
15
1. Underline the number in the place value you will round.
2. Circle the number to the right of the underlined number.
Round to the nearest ten:
3. Use the rounding pyramid:
RULES FOR ROUNDING
1. Underlined number rounds up one
2. Add the zeros
1. Underlined number stays the same
2. Add the zeros
5
7
84
601
23
9
4. Any digit to the left of the underlined digit stays the same.
Copyright © 2013 Kelly Mott
Rounding Practice 2:
33
1. Underline the number in the place value you will round.
2. Circle the number to the right of the underlined number.
Round to the nearest ten:
3. Use the rounding pyramid:
RULES FOR ROUNDING
1. Underlined number rounds up one
2. Add the zeros
1. Underlined number stays the same
2. Add the zeros
5
7
84
601
23
9
4. Any digit to the left of the underlined digit stays the same.
Copyright © 2013 Kelly Mott
Rounding Practice 3:
228
1. Underline the number in the place value you will round.
2. Circle the number to the right of the underlined number.
Round to the nearest ten:
3. Use the rounding pyramid:
RULES FOR ROUNDING
1. Underlined number rounds up one
2. Add the zeros
1. Underlined number stays the same
2. Add the zeros
5
7
84
601
23
9
4. Any digit to the left of the underlined digit stays the same.
Copyright © 2013 Kelly Mott
Rounding Practice 4:
3,614
1. Underline the number in the place value you will round.
2. Circle the number to the right of the underlined number.
Round to the nearest ten:
3. Use the rounding pyramid:
RULES FOR ROUNDING
1. Underlined number rounds up one
2. Add the zeros
1. Underlined number stays the same
2. Add the zeros
5
7
84
601
23
9
4. Any digit to the left of the underlined digit stays the same.
Copyright © 2013 Kelly Mott
Rounding Practice 5:
32,576
1. Underline the number in the place value you will round.
2. Circle the number to the right of the underlined number.
Round to the nearest ten:
3. Use the rounding pyramid:
RULES FOR ROUNDING
1. Underlined number rounds up one
2. Add the zeros
1. Underlined number stays the same
2. Add the zeros
5
7
84
601
23
9
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
Rounding Practice 1:
215
1. Underline the number in the place value you will round.
2. Circle the number to the right of the underlined number.
Round to the nearest hundred:
3. Use the rounding pyramid:
RULES FOR ROUNDING
1. Underlined number rounds up one
2. Add the zeros
1. Underlined number stays the same
2. Add the zeros
5
7
84
601
23
9
4. Any digit to the left of the underlined digit stays the same.
Copyright © 2013 Kelly Mott
Rounding Practice 2:
563
1. Underline the number in the place value you will round.
2. Circle the number to the right of the underlined number.
Round to the nearest hundred:
3. Use the rounding pyramid:
RULES FOR ROUNDING
1. Underlined number rounds up one
2. Add the zeros
1. Underlined number stays the same
2. Add the zeros
5
7
84
601
23
9
4. Any digit to the left of the underlined digit stays the same.
Copyright © 2013 Kelly Mott
Rounding Practice 3:
3,481
1. Underline the number in the place value you will round.
2. Circle the number to the right of the underlined number.
Round to the nearest hundred:
3. Use the rounding pyramid:
RULES FOR ROUNDING
1. Underlined number rounds up one
2. Add the zeros
1. Underlined number stays the same
2. Add the zeros
5
7
84
601
23
9
4. Any digit to the left of the underlined digit stays the same.
Copyright © 2013 Kelly Mott
Rounding Practice 4:
13,854
1. Underline the number in the place value you will round.
2. Circle the number to the right of the underlined number.
Round to the nearest hundred:
3. Use the rounding pyramid:
RULES FOR ROUNDING
1. Underlined number rounds up one
2. Add the zeros
1. Underlined number stays the same
2. Add the zeros
5
7
84
601
23
9
4. Any digit to the left of the underlined digit stays the same.
Copyright © 2013 Kelly Mott
Rounding Practice 5:
51,318
1. Underline the number in the place value you will round.
2. Circle the number to the right of the underlined number.
Round to the nearest hundred:
3. Use the rounding pyramid:
RULES FOR ROUNDING
1. Underlined number rounds up one
2. Add the zeros
1. Underlined number stays the same
2. Add the zeros
5
7
84
601
23
9
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
Rounding Practice 1:
2,415
1. Underline the number in the place value you will round.
2. Circle the number to the right of the underlined number.
Round to the nearest thousand:
3. Use the rounding pyramid:
RULES FOR ROUNDING
1. Underlined number rounds up one
2. Add the zeros
1. Underlined number stays the same
2. Add the zeros
5
7
84
601
23
9
4. Any digit to the left of the underlined digit stays the same.
Copyright © 2013 Kelly Mott
Rounding Practice 2:
1,233
1. Underline the number in the place value you will round.
2. Circle the number to the right of the underlined number.
Round to the nearest thousand:
3. Use the rounding pyramid:
RULES FOR ROUNDING
1. Underlined number rounds up one
2. Add the zeros
1. Underlined number stays the same
2. Add the zeros
5
7
84
601
23
9
4. Any digit to the left of the underlined digit stays the same.
Copyright © 2013 Kelly Mott
Rounding Practice 3:
13,581
1. Underline the number in the place value you will round.
2. Circle the number to the right of the underlined number.
Round to the nearest thousand:
3. Use the rounding pyramid:
RULES FOR ROUNDING
1. Underlined number rounds up one
2. Add the zeros
1. Underlined number stays the same
2. Add the zeros
5
7
84
601
23
9
4. Any digit to the left of the underlined digit stays the same.
Copyright © 2013 Kelly Mott
Rounding Practice 4:
39,150
1. Underline the number in the place value you will round.
2. Circle the number to the right of the underlined number.
Round to the nearest thousand:
3. Use the rounding pyramid:
RULES FOR ROUNDING
1. Underlined number rounds up one
2. Add the zeros
1. Underlined number stays the same
2. Add the zeros
5
7
84
601
23
9
4. Any digit to the left of the underlined digit stays the same.
Copyright © 2013 Kelly Mott
Rounding Practice 5:
103,718
1. Underline the number in the place value you will round.
2. Circle the number to the right of the underlined number.
Round to the nearest thousand:
3. Use the rounding pyramid:
RULES FOR ROUNDING
1. Underlined number rounds up one
2. Add the zeros
1. Underlined number stays the same
2. Add the zeros
5
7
84
601
23
9
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
1. 18,200
2. 11,400
3. 143,466
4. 106,640Copyright © 2013 Kelly Mott
Round to the Nearest Ten Thousand
1. 52,109
2. 16,419
3. 701,466
4. 167,640Copyright © 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
1. 352,200
2. 161,400
3. 5,143,466
4. 8,706,640Copyright © 2013 Kelly Mott
Round to the Nearest 100 Thousand
1. 337,488
2. 169,859
3. 7,450,466
4. 2,247,640Copyright © 2013 Kelly Mott
Does this make sense so far?
Copyright © 2013 Kelly Mott
Copyright © 2013 Kelly Mott
Online Practice:
Copyright © 2013 Kelly Mott
