1. Tina Stowe 2nd Grade Wooden Elementary Red Oak, Texas
Subtraction Problem Solving Day 1: Take away
2-digit and 3- digit subtraction
without regrouping
Tina Stowe
2nd Grade
Wooden Elementary
Red Oak, Texas

2. 1. Mrs. Carson’s room has 27 chairs. Mrs. Black borrowed 12 of Mrs
1. Mrs. Carson’s room has 27 chairs. Mrs. Black borrowed 12 of Mrs. Carson’s chairs.  How many chairs are in Mrs. Carson’s room now? Use your concrete objects to solve the problem first. Use the objects your teacher gave you to model solving this problem. Do not write anything yet.

3. Mrs. Carson’s room has 27 chairs. Mrs. Black borrowed 12 of Mrs
Mrs. Carson’s room has 27 chairs. Mrs. Black borrowed 12 of Mrs. Carson’s chairs.  How many chairs are in Mrs. Carson’s room now?
Pictorial
Number Sentence
Number Line
Mental Math Strategy- Basic Math Facts

4. 27 - 12 = 15 Mental Math Strategy- 5 ones 1 tens
You can use your knowledge of basic math facts to help you solve this problem. Write this on your paper in the box labeled Mental math. = 15
5 ones
1 tens

5. 2. There were 44 people on a train
2. There were 44 people on a train. At the first stop, 38 people got off. How many people are still on the train?
Use the objects your teacher gave you to model solving this problem. Do not write anything yet.

6. 2. There were 44 people on a train
2. There were 44 people on a train. At the first stop, 38 people got off. How many people are still on the train?
Pictorial
Number Sentence
Number Line
Mental Math Strategy- Compatible Numbers

7. 44 - 38 - Mental Math Strategy- 46 40 = 6 +2 +2
You can use compatible numbers (friendly) to help you solve this problem. Write this on your paper in the box labeled Mental math. +2 +2
You can add 2 to 44 as long as you also add 2 to 38. - 46 40
= 6

8. 3. There are 163 basketball games on Pat’s schedule
3. There are 163 basketball games on Pat’s schedule.  He has already played 147 games. How many basketball games does he have left to play?
Use the objects your teacher gave you to model solving this problem. Do not write anything yet.

9. 3. There are 163 basketball games on Pat’s schedule
3. There are 163 basketball games on Pat’s schedule.  He has already played 147 games. How many basketball games does he have left to play?
Pictorial
Number Sentence
Number Line
Mental Math Strategy- Counting up

10. 163 - 147 = 16 163 160 147 150 Mental Math Strategy-
Counting up
Which number is the
smallest?
Your difference is 16. = 16 +3
+10 +3
163
147
150
160
Start at What is the
closest ten to 147?
How much did I have to add to 147 to get to 163?
Now, you can count by tens!
How much would we need to add to 147 to get to 150?

11. 4. A farmer planted 176 red roses. 153 of the roses die
4. A farmer planted 176 red roses of the roses die. How many roses does the farmer have now?
Use the objects your teacher gave you to model solving this problem. Do not write anything yet.

12. 4. A farmer planted 176 red roses. 153 of the roses die
4. A farmer planted 176 red roses of the roses die. How many roses does the farmer have now?
Pictorial
Number Sentence
Number Line
Mental Math Strategy- Partial Differences

13. 176 - 153 23 100 + 70 + 6 - 100 + 50 + 3 20 + 3 Mental Math Strategy-
Partial Differences using expanded form
Mental Math Strategy-
176
- 153
Your difference is 23. - 23 20 + 3