Page 10 - TG_G1_CH6_CHRIS

1 More and 10 More
Use the 100 chart. Give children red and yellow counters. Ask them to place one red counter on
• Place a red counter on 69. Move the counter 1 step to the right.
Color the number red. number 69.
• Place a yellow counter on 69. Move the counter 1 step down. Say: Move one step to the right and color the space red.
Color the number yellow. Then, have them place one yellow counter on number 69.
• Write the missing numbers in the spaces below.
Say: Move the counter one step down and color the space yellow.
1 2 3 4 5 6 7 8 9 10
What is the number next to 69? 70
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 What is 1 more than 69? 70
31 32 33 34 35 36 37 38 39 40 What do you notice? the number on the right is one more
What is the number below 69? 79
41 42 43 44 45 46 47 48 49 50
51 52 53 54 55 56 57 58 59 60 What is 10 more than 69? 79
What do you notice? the number below is 10 more
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 Complete the sentence 1 more than 69 is 70, 10 more than 69 is 79
91 92 93 94 95 96 97 98 99 100
79
70
1 more than 69 is . 10 more than 69 is .
ANCHOR ACTIVITY
1.NBT.5 Given a two-digit number, mentally find 10 more or 10 less than the number without having to count, explain the reasoning used.
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Use the Anchor Activity for this lesson as a warm-up to gauge
children’s prior knowledge and help them engage at the
beginning of class.

TIME TO LEARN TIME TO LEARN
1 more than 52 is 53. 1 more
1 2 3 4 5 6 7 8 9 10
I started at 52.
Number 11 12 13 14 15 16 17 18 19 20 Give each child a 120 chart. Direct them to count on from 1 to 20 in one’s.
I wanted to add 1.
One More I move one step to the 21 31 22 32 23 33 24 34 25 35 26 36 27 37 28 38 29 39 30 40
Ten More right to get the next 41 42 43 44 45 46 47 48 49 50
number. 10 more 51 61 52 62 53 63 54 64 55 65 56 66 57 67 58 68 59 69 60 70 Each time we move one step to the right, we count on 1 more.
Each time we move one step down, we count 10 more.
81 71 72 82 73 83 74 84 75 85 76 86 77 87 78 88 79 89 80 90
I started at 52. 91 92 93 94 95 96 97 98 99 100
I wanted to add 10. 101 102 103 104 105 106 107 108 109 110 Ask: What is 1 more than 52? 53
I move on 10 spaces or 111 112 113 114 115 116 117 118 119 120
move one step down to What is 10 more than 52? 62
get the next ten.
1 more A 100 chart will help children develop their knowledge of counting. Repeat
10 more than 52 is 62. 10 more
right asking children to find 1 more and 10 more than a given numbers to ensure
STEP Write the missing number. down they have mastered the concept.
BY
STEP
Common
1 97 1 more 98 4 97 10 more 107 Common
Errors
Errors
2 39 1 more 40 5 79 10 more 89
3 118 1 more 119 6 110 10 more 120 Children may become confused when asking them 1 more and 10
more of a number that does not end with 0 or 5 such as 56. When
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counting by multiples of ten, some students may think you cannot
unless the number ends in 0. If you ask students to count by 10s, they
will count 10, 20 30, etc. If you ask students to count by 10s starting at
50, they will count 60, 70, 80 etc. But if you ask students to count by 10s
starting at 18, some students will think you cannot. Have students look
at the hundreds chart and count, 18, 28, 38, 48, etc.

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