Compensation Strategy Addition Practice Quiz (Grade 3)

📚 Topic Summary

• 💡Compensation Strategy: It's a trick to make addition easier! Instead of adding tricky numbers, we change them to friendlier ones, like numbers ending in zero.
• 🍎Example: Instead of $29 + 15$, we can think of it as $30 + 14$. We took $1$ from $15$ and gave it to $29$ to make it $30$!

✏️ Activity Time!

✍️ Vocabulary

• 🧮 Compensation: Changing numbers to make math easier.
• ➕ Addend: A number being added.
• 🎯 Sum: The answer to an addition problem.

✍️ Fill in the Blanks

1. To use compensation, we __________ one addend and __________ the other. (adjust, change)
2. When we compensate, the __________ stays the same. (sum)

🤔 Critical Thinking

Explain in your own words why the compensation strategy works. Use an example.

➕ Practice Problems

Use the compensation strategy to solve these problems:

1. 19 + 23 = ? (Think: 20 + ?)
2. 38 + 14 = ? (Think: 40 + ?)
3. 47 + 25 = ? (Think: 50 + ?)

✅ Answer Key

Fill in the Blanks:

1. adjust, change
2. sum

Practice Problems:

1. 19 + 23 = 42 (20 + 22 = 42)
2. 38 + 14 = 52 (40 + 12 = 52)
3. 47 + 25 = 72 (50 + 22 = 72)