Podcast Beta
Questions and Answers
What is 5 + 3?
What are the number bonds for 12?
What is the counting on strategy for 3 + 4?
What is the counting back strategy for 9 - 2?
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What is the making ten strategy for 7 + 3?
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What is 7 - 2?
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What are the number bonds for 8?
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What is the counting on strategy for 2 + 5?
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What is the making ten strategy for 6 + 4?
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Study Notes
Basic Facts
- Addition and subtraction facts within 20, such as 5 + 3 = 8, 7 - 2 = 5
- Focus on memorization of basic facts to build fluency
- Examples:
- Addition: 1 + 1 = 2, 2 + 2 = 4, 3 + 3 = 6
- Subtraction: 5 - 1 = 4, 8 - 2 = 6, 9 - 3 = 6
Number Bonds
- A number bond is a pair of numbers that add up to a certain number
- Example: 3 + 7 = 10, so 3 and 7 are number bonds for 10
- Number bonds help with mental math and building fluency with addition and subtraction facts
- Examples:
- Number bonds for 10: 1 + 9, 2 + 8, 3 + 7, 4 + 6, 5 + 5
- Number bonds for 15: 5 + 10, 6 + 9, 7 + 8
Counting On
- Counting on is a strategy used to solve addition problems
- Start with the first number and count on the second number
- Example: 5 + 3 = ?, start with 5 and count on 3: 5, 6, 7, 8
- Counting on helps build fluency with addition facts and promotes mental math
Counting Back
- Counting back is a strategy used to solve subtraction problems
- Start with the first number and count back the second number
- Example: 8 - 3 = ?, start with 8 and count back 3: 8, 7, 6, 5
- Counting back helps build fluency with subtraction facts and promotes mental math
Making Ten
- Making ten is a strategy used to solve addition and subtraction problems
- Focus on making a ten by adding or subtracting numbers to get close to ten
- Example: 8 + 2 = ?, make ten by adding 2 to 8: 8, 9, 10
- Making ten helps build fluency with addition and subtraction facts and promotes mental math
Basic Facts
- Memorize addition and subtraction facts within 20 to build fluency
- Examples of basic addition facts: 1 + 1 = 2, 2 + 2 = 4, 3 + 3 = 6
- Examples of basic subtraction facts: 5 - 1 = 4, 8 - 2 = 6, 9 - 3 = 6
Number Bonds
- Number bonds are pairs of numbers that add up to a specific number
- Example: 3 and 7 are number bonds for 10 because 3 + 7 = 10
- Number bonds help with mental math and fluency in addition and subtraction facts
- Examples of number bonds:
- For 10: 1 + 9, 2 + 8, 3 + 7, 4 + 6, 5 + 5
- For 15: 5 + 10, 6 + 9, 7 + 8
Counting On
- Counting on is a strategy for solving addition problems
- Start with the first number and count on the second number
- Example: 5 + 3 = ?, start with 5 and count on 3: 5, 6, 7, 8
- Counting on builds fluency with addition facts and promotes mental math
Counting Back
- Counting back is a strategy for solving subtraction problems
- Start with the first number and count back the second number
- Example: 8 - 3 = ?, start with 8 and count back 3: 8, 7, 6, 5
- Counting back builds fluency with subtraction facts and promotes mental math
Making Ten
- Making ten is a strategy for solving addition and subtraction problems
- Focus on making a ten by adding or subtracting numbers to get close to ten
- Example: 8 + 2 = ?, make ten by adding 2 to 8: 8, 9, 10
- Making ten builds fluency with addition and subtraction facts and promotes mental math
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Description
Test your knowledge of basic addition and subtraction facts within 20 and understand number bonds. Fluency with these fundamentals is crucial for mental math and problem-solving skills.
