1. Module 5
Lesson 1

2. Objective
Relate 10 more, 10 less, 100 more, and 100 less to addition and subtraction of 10 and 100.

3. Place Value Show 6 ones in chips. Write the number below it.
Show 1 chip in the tens column and write the number below it.
Say the number the Say Ten way.
1 ten 6.
Say the number in standard form.
16.
Add 1 chip to your tens column. What is 10 more than 16?
The Say Ten way?
2 tens 6.
Materials: Personal white boards, place value charts

4. Place Value Continued
Now add 1 chip to your hundreds column. What is 100 more than 26?
The Say Ten way?
1 hundred 2 tens 6.
Cross out a chip in the tens column. What is 10 less than 126?
116.
1 hundred 1 ten 6.
Cross out a chip in the hundreds column. What is 100 less than 116?
If needed, continue with the following possible sequence for more practice: 254, 310, and 505.

5. More / less
For every number I say, you say a number that is 10 more. When I say 5, you say 15. Ready?
Now for every number I say, you say a number that is 10 less. When I say 20, you say 10. Ready? 5 10 19 67 90 95
110
111
139
156
256
299
305
319 20 22 19 78
100
107
182
201
299
312
321
439
456
515

6. More / Less Continued
Let’s try saying 100 more for every number I say. When I say 56, you say Ready?
Now for every number I say, you say a number that is 100 less. When I say 150, you say 50. Ready? 56 37 80 8 88
288
300
333
566
481
256
699
805
900
150
159
168
170
192
270
277
301
399
400
404
434
556
615

7. Story Problem
RDW
The shelter rescued 27 kittens in June. In July, it rescued 11 more. In August, it rescued 40 more.
How many kittens did the shelter rescue during those 3 months?
If 64 of those kittens found homes by August, how many still needed homes?

8. Story Problem Continued
The shelter rescued 27 kittens in June. In July, it rescued 11 more. In August, it rescued 40 more.
How many kittens did the shelter rescue during those 3 months?
If 64 of those kittens found homes by August, how many still needed homes?

9. CONCEPT DEVELOPMENT
Use your number disks to show me 157 on your place value chart.
Show me 10 more.
Use a sentence frame to describe adding 10 to Ready?
What did you do to change 157? Be specific.
Give me an addition sentence starting with 157.
= 167.
Who can give me an addition sentence starting with 167?
Materials: 7 hundreds disks, 9 tens disks, 9 ones disks, place value charts

10. Concept development Continued
Show me 157 again.
Show me 10 less.
Use a sentence frame to describe taking away10 to Ready?
What did you do to change 157? Be specific.
Give me an subtraction sentence starting with 157.
= 147.
Who can give me a subtraction sentence starting with 147?

11. Concept development Continued
Show me 157 again.
Show me 100 more.
Use a sentence frame to describe adding 100 to Ready?
What did you do to change 157? Be specific.
Give me an addition sentence starting with 157.
= 257.
Who can give me an addition sentence starting with 257?

12. Concept development Continued
Show me 157 again.
Show me 100 less.
Use a sentence frame to describe taking away 100 to Ready?
What did you do to change 157? Be specific.
Give me a subtraction sentence starting with 157.
= 57.
Who can give me a subtraction sentence starting with 57?

13. Concept Development Continued
Talk with your partner. Use place value language to explain what you understand about 10 more, 10 less, 100 more, and 100 less.
Listen as I say a number pattern. Raise your hand when you know the more or less rule for my pattern. For example, if I say, “121, 131, 141, 151, 161,” you say, “10 more.” Wait for my signal. Ready?
135, 145, 155, 165, 175.
546, 446, 346, 246, 146.
282, 272, 262, 252, 242.
382, 482, 582, 682, 782.
***COLLECT NUMBER DISKS AND CHARTS

14. Concept development Continued
Take out your personal boards. Now I’ll write a series of numbers on the board. You write the rule and the next three numbers.
The rules are + 10, ─ 10, + 100, and ─ 100. Turn your board over when you have written your answer. Wait until I say, “Show me.” Ready?
67, 57, 47, ____, ____, ____.
Show me.
945, 845, 745, ____, ____.
328, 428, 528, ____, ____.
Show me.
194, 184, 174, ____, ____.

15. Concept Development Continued
Let’s try something different.
What is ? Show me.
─ 10?
─ 100?
In the last module, we used this simplifying strategy; we called it the arrow way. Talk to your partner about how this example is the same as and different from the ones we’ve done before.
If necessary or if time permits, model another example with the following problem: 367 – 220.