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Addition Strategies Practice
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Addition Strategies Practice
Use mental math to add. Show your thinking when asked.
Choose a Strategy
Try doubling, making tens, or breaking numbers apart.
1.What is 32 + 32? Choose the strategy that fits this problem best.
- Doubling
- Making tens
- Counting back
2.Add 36 + 47 by breaking 47 into tens and ones. Show the steps and give the sum.
3.Use doubling to find 42 + 42. Write the total and explain what you doubled.
4.Find 27 + 18 by splitting 18 to make the next ten. Complete the steps: 27 + 18 = 27 + + = + = .
Show Your Thinking
Solve each story problem and name a strategy that could help.
5.At a weather station, Sofia records 45 cloudy hours and 28 sunny hours over several days. How many hours did she record altogether? Show a strategy.
6.Carlos measures 36 millimeters of rain on Monday and 29 millimeters on Tuesday. What is the total rainfall for the two days? Name a strategy that could help and show how you use it.
7.For each addition problem, write D for doubling, T for making a ten, or H for making a hundred. Choose the strategy that seems most useful.
25 + 25
68 + 32
39 + 16
47 + 47
Explain and Try a Challenge
Use the numbers in each question to explain your thinking.
8.Which strategy is most direct for 38 + 38? Choose one.
- Doubling
- Making a hundred
- Counting back
9.Why does doubling help with 38 + 38? Use the numbers in your explanation.
10.Challenge: Solve 26 + 34 in two different ways. Show one way by making a ten and another by breaking apart the numbers.
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