100 Chart

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100 Chart
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EALRS GLES

• EALR 1 The student understands and applies the
  concepts and procedures of mathematics.
• Component 1.1 Understand and apply concepts and
  procedures from number sense.
• GLE 1.1.2 Understand sequential relationships
  among whole numbers to at least 100.
• GLE 1.1.5 Understand the meaning of addition
  and subtraction and how they relate to one
  another.
• GLE 1.1.7 Understand and apply strategies and
  appropriate tools for adding and subtracting with
  whole numbers. (Use calculator, manipulatives, or
  paper and pencil to solve addition or subtraction
  problems.)

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Think of Some Ways We Can Count To 100?
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Lesson Overview

• Learn how the 100 chart works
• Investigate skip counting by 2s, 5s, and 10s
• Explore number patterns on the 100 chart

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Locating Numbers

• Im thinking of a number that is 1 more than 32.
• Im thinking of a number that is 2 less than 70.
• Im thinking of a number that is 10 more than 90.
• Im thinking of a number that is 2 tens and 5
  ones.

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Skip Counting By 2s Up To 40
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
51 52 53 54 55 56 57 58 59 60
61 62 63 64 65 66 67 68 69 70
71 72 73 74 75 76 77 78 79 80
81 82 83 84 85 86 87 88 89 90
91 92 93 94 95 96 97 98 99 100

• What are some patterns you notice?
• Would we cover the number 52 if we continued
  counting by 2s?
• Would we cover the number 76?
• What about 85?

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Skip Counting By 5s Up to 50
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
51 52 53 54 55 56 57 58 59 60
61 62 63 64 65 66 67 68 69 70
71 72 73 74 75 76 77 78 79 80
81 82 83 84 85 86 87 88 89 90
91 92 93 94 95 96 97 98 99 100

• What are some patterns you notice?

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Skip Counting By 10s Up to 100
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
51 52 53 54 55 56 57 58 59 60
61 62 63 64 65 66 67 68 69 70
71 72 73 74 75 76 77 78 79 80
81 82 83 84 85 86 87 88 89 90
91 92 93 94 95 96 97 98 99 100

• What are some patterns you notice?
• How many 10s does it take to equal 100?

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Targeting Numbers on the 100 Chart Target
Number 25

• One less than 25
  
• One more than 25
• Ten less than 25
• Ten more than 25

24
26
15
35
14 15 16
24 25 26
34 35 36
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Questions

• What do you notice when we move to the left on
  the 100 chart?
• Numbers get smaller
• Subtracting
• What do you notice when we move to the right on
  the 100 chart?
• Numbers get bigger
• Addition
• What do you notice when we move up one row?
• The second digit is the same
• Subtracting
• What do you notice when we move down one row?
• The second digit is the same
• Addition

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Lets Try Some MoreTarget Number 22

• One less than 22
  
• One more than 22
• Ten less than 22
• Ten more than 22

21
23
12
32
11 12 12
21 22 23
31 32 33
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Find the Missing NumbersTarget Number 36

36

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Reference

• The 100 Chart. In Math Trailblazers A
  Mathematical Journey Using Science and
  Language Arts. (296-299). Dubuque, IA
  Kendall/Hunt Publishing.