## Represent and solve problems involving addition and subtraction

Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

## Related Lessons

Lesson 112

Solve addition and subtraction word problems with a Step-by-Step Visual Model checklist. Understand what the problem is asking to help you solve it. Engage in a Number Talk to find "how many" and to answer a secret question.

Lesson 111

Solve comparison word problems using data we get from questions like, Which meal is your favorite, breakfast, lunch or dinner? Play a game to use data to determine if a statement is true or false. Engage in a Number Talk to find "how many" and to answer a secret question.

Lesson 203

Represent 10 using a number bond and 10-frame with a missing addend. Use Notice and Wonder with a 10-frame, connecting [...]

Lesson 204

Represent a teen number using a number bond to solve a Mystery Math Mistake. Use Notice and Wonder with a [...]

Lesson 317

Join Mrs. Markavich with a Mystery Math Mistake - see if you can help D.C. with an addition mistake! We'll solve word problems with unknowns in different positions.

Lesson 318

Join Mrs. Markavich with a Mystery Math Mistake - see if you can help D.C. and Value Pak with an addition mistake! We'll also solve word problems and write equations to match.

Lesson 315

Join Mrs. Markavich with a Mystery Math Mistake - see if you can help Professor Barble with his word problem error! We'll also solve measurement word problems and compare lengths.

Lesson 316

Join Mrs. Markavich with a Mystery Math Mistake - see if you can help Professor Barble with his word problem. We'll also solve measurement word problems and comparie lengths.

Lesson 307

Join Mrs. Markavich for a subtraction word problem with Professor Barble. Next, get ready to make sense of equations that have a missing part and look out for D.C. as we make a ten to solve addition easier!

Lesson 308

Join Mrs. Markavich for a missing addend word problem with Professor Barble. Next, we are going to look closely at addition problems to see when we make a new ten or when we don't. You will be an expert and looking carefully at addition problems!

Lesson 309

Join Mrs. Markavich for a missing addend word problem with Professor Barble! Look out for two of our Math Might friends D.C. and Value Pak as they help us learn to add two-digit number in more than one way!

Lesson 310

Join Mrs. Markavich for a missing addend word problem with Professor Barble! Next we are going to spend some quality time with Value Pak as we learn to add by adding tens-and-tens then ones-and-ones!

Lesson 305

Join Mrs. Markavich for a word problem with her friend Professor Barble! Next, get ready to have some fun with Value Pak as we add 2-digit numbers using base ten strategies!

Lesson 306

Join Mrs Markavich with a part-whole missing addend word problem with her friend Professor Barble. Next, get ready to have some fun with D.C. adding 2 digit-numbers to a 1 digit number by making a friendly decade number!

Lesson 303

Join Mrs. Markavich for a word problem with her friend Professor Barble! Get ready to have some fun adding tens and ones with ten frames and with a game called "What did I Add"!

Lesson 304

Join Mrs. Markavich for a word problem with her friend Professor Barble! Next, we will work on adding two-digit numbers and matching equations!