## Represent and solve problems involving addition and subtraction

Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.

## Related Lessons

• Lesson 207

Warm up with a Mystery Math Mistake to find the mistake made in counting up on a number line to subtract. Use visual models to practice adding and subtracting lengths of objects within 100.

• Lesson 201

###### One Step Story Problems

Warm up with a Mystery Math Mistake to hunt for the mistake in adding two 2-digit numbers using a decomposition [...]

• Lesson 202

###### Match Word Problems to Visual Models

Warm up with a Mystery Math Mistake as you add two 2-digit numbers using a decomposition strategy. Find Which One [...]

• Lesson 318

###### Problems with Money

Join Mrs. McCartney for a Mystery Math Mistake - T-Pops needs your help with subtraction! We'll solve addition and subtraction story problems involving money.

• Lesson 308

###### Draw Shapes

Join Mrs. McCartney for a word problem with Professor Barble that will make more sense with a visual model. Get ready to have fun using attributes like sides, corners, side lengths and square corners to create shapes!

• Lesson 307

###### Name the Parts of Fractions

Join Ms. Askew for a division word problem with her friend Professor Barble. Next, get ready to start to explore fractions by learning about partitioning parts of a whole!

• Lesson 310

###### Compose Shapes

Join Mrs. McCartney for some fun with Professor Barble doing a tricky comparison word problem. Next we are going have some fun with pattern blocks composing different shapes. How many ways can you make a hexagon?

• Lesson 305

###### Compare 3-Digit Numbers Part 2

Join Mrs. McCartney to learn how to do a comparison word problem with Professor Barble! Next, we are going to work on comparing 3 Digit numbers with a game of true and false! Plus we will use numberline, Value Pak, Place Value discs and blocks to compare! Which tool will you pick to use?

• Lesson 306

###### Order 3-Digit Numbers

Join Mrs. McCartney for a comparison word problem with her friend Professor Barble. Next, get ready to order 3-digit numbers using place value understanding. We will be using number lines and Value Pak to help apply our thinking.

• Lesson 303

###### Comparing Numbers on a Number line

Join Mrs. McCartney for a word problem with Professor Barble using Visual Models! Next great ready to locate and compare 3-digit numbers on a number line! We may even see our friend Value Pak to help us!

• Lesson 304

###### Compare 3-Digit Numbers Part 1

Join Mrs. McCartney to go on a mission to see if we can figure out Professor Barble's comparison word problem. Next, get ready for some fun with Value Pak and Base-Ten blocks as we compare 3-Digit Numbers