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G.1 Match the addition sentence to its model - sums up to 10

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What is addition?

Addition is putting two or more groups together to find the total. We use the plus sign (+) and the equals sign (=) to write addition sentences.

Example:
  • If you have 3 apples and get 2 more apples, you have 5 apples in total.
  • This is written as: 3 + 2 = 5
Note

Addition answers the question: "How many do I have altogether?"

Reading an addition sentence

An addition sentence has three parts: the numbers you are adding and the total. The numbers you add are called addends, and the answer is called the sum.

Example Sentence:
  • 4 + 3 = 7
  • Addends: 4 and 3
  • Sum: 7
How to say it:

"Four plus three equals seven."

Remember

The equals sign = means "is the same as" or "makes."

What is a model in math?

A model is a picture or object that helps us understand a math problem. For addition, a model shows the groups you are putting together.

Types of models:
  • Dots or circles arranged in groups
  • Counters like blocks or beads
  • Drawings of objects like stars or animals
Example Model:

○○○ + ○○ represents 3 + 2.

Tip

Models help you "see" the math. Pointing and counting each object in the model can make solving the problem easier.

How to match a model to an addition sentence

To find the correct addition sentence for a model, you must count carefully and compare what you see to the numbers in the sentences.

Step-by-step guide:
  1. Count the first group of objects in the model.
  2. Count the second group of objects in the model.
  3. Add the two numbers together to find the total.
  4. Look for the sentence that has the same two numbers and the same total.
Be Careful

Sometimes the model might show the groups in a different order (like 2 + 5 instead of 5 + 2). Remember, in addition, the order doesn't change the total!

Practice strategy: Use your finger to count

When a model has many objects, a good strategy is to point to each one as you count. This helps you keep track and not miss any.

Let's try it together:

Look at this model: ★★★★ + ★★★

  1. Point and say: "1, 2, 3, 4 stars in the first group."
  2. Point and say: "1, 2, 3 stars in the second group."
  3. Now count all stars: "1, 2, 3, 4, 5, 6, 7 stars total."
  4. The matching sentence is 4 + 3 = 7.
Helpful Hint

If you're not sure, cross out the answer choices you know are wrong. This makes finding the right one easier!

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Common Core alignment: CCSS.MATH.CONTENT.1.OA.A.1 – 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. CCSS.MATH.CONTENT.1.OA.C.5 – Relate counting to addition and subtraction.

Notes for teachers

This free lesson is aligned with CCSS.MATH.CONTENT.1.OA.A.1 and CCSS.MATH.CONTENT.1.OA.C.5. Use it for whole-class instruction, independent practice, or homework.

The focus on matching models to number sentences builds a concrete understanding of addition as combining groups, a foundational skill for future word problems and operations.

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