Solve One-Step Addition and Subtraction Equations

My Notes Level 1 Support Level 2 Standard Level 3 Enrichment

Today's objectives

Content Objective: I can solve one-step addition and subtraction equations using inverse operations.

Language Objective: I can explain my steps using the words equation, inverse operation, isolate, and solution.

📖 See Learn It for the explanation and worked examples, and the Vocab tab for the words. These are your notes to fill in and keep.

✏️ Fill in each blank as we go. Use the Word Bank to help you.

📚 Word Bank — fill each blank with the best word

👆 Tap any word to see what it means and a picture.

Level 3: try the blanks from memory first, then check the bank.

1A math sentence with an equal sign showing two equal amounts is an .
2An operation that undoes another, like subtraction undoing addition, is an .
3To get the variable alone on one side of the equation is to it.
4The value of the variable that makes the equation true is the .
5An equation solved in a single step is a .
6Doing the same thing to both sides to keep them equal keeps the equation in .

Write About the Math Guided ESOL writing

Use the support level you need. Every level answers the same math question.

1. Understand the Question

explain

What inverse operation did you use to solve n + 23 = 58, and why must you do it to BOTH sides of the balance?

Your job: Answer the question. Use math evidence. Explain how the evidence proves your answer.Responde la pregunta. Usa evidencia matemática. Explica cómo la evidencia demuestra tu respuesta.

2. Plan Your Math Words

Check at least two words you will use.

Equation — A math sentence with an equal sign showing both sides are the same.Ecuación — Una oración matemática con un signo igual que muestra que ambos lados son iguales. Inverse operation — Two math actions that undo each other, like × and ÷.Operación inversa — Dos operaciones que se deshacen entre sí, como × y ÷. Isolate — To get the letter by itself on one side.Despejar — Dejar la letra sola en un lado. Solution — The number that makes the equation true.Solución — El número que hace verdadera la ecuación. One-step equation — An equation you can solve in a single step using one inverse operation.Ecuación de un paso — Una ecuación que puedes resolver en un solo paso usando una operación inversa.

Say it first: Say your idea to a partner or quietly to yourself before you write.Di tu idea a un compañero o en voz baja antes de escribir.

I used ___ to undo ___, so the variable equals ___.Usé ___ para deshacer ___, así que la variable es igual a ___.

3. Build Your Explanation

Model the parts: This model shows the parts of an explanation. It does not answer your writing question.

Claim: I can undo the addition to get the variable by itself.

Evidence: Students recognize 23 is added to n and that subtracting 23 (the inverse operation) from both sides will isolate n.

Reasoning: This evidence connects the definition of equation to the mathematical claim.

Start

Most language support

Complete the frames. Use the word bank.Completa las oraciones. Usa el banco de palabras.

I used ___ to undo ___, so the variable equals ___.Usé ___ para deshacer ___, así que la variable es igual a ___.
I do it to both sides because ___.Lo hago en ambos lados porque ___.

Build

Some language support

Write two connected sentences. Use because, so, or but.Escribe dos oraciones conectadas. Usa porque, entonces o pero.

My claim is ___.Mi afirmación es ___.
I know because ___.Lo sé porque ___.
So ___.Entonces ___.

Explain

Light language support

Write a claim, give math evidence, and explain your reasoning.Escribe una afirmación, da evidencia matemática y explica tu razonamiento.

My claim is ___.Mi afirmación es ___.
My math evidence is ___.Mi evidencia matemática es ___.
This proves ___ because ___.Esto demuestra ___ porque ___.

4. Check Your Explanation

I answered the question.Respondí la pregunta. I used math evidence: numbers, an equation, a model, or a comparison.Usé evidencia matemática: números, una ecuación, un modelo o una comparación. I explained how the evidence proves my answer.Expliqué cómo la evidencia demuestra mi respuesta. I used at least two math words.Usé por lo menos dos palabras matemáticas. I reread complete sentences and punctuation.Volví a leer mis oraciones completas y la puntuación.