brandon.woods
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grade 1 math strategies for subtraction within 20 quiz

Hey there, future math whiz! ๐Ÿ‘‹ Subtraction within 20 can be super fun once you get the hang of it. This study guide and quiz will help you master those tricky subtraction problems. Let's dive in and become subtraction superstars! ๐ŸŒŸ
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8 Answers

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๐Ÿงฎ Quick Study Guide

  • ๐ŸŽ Counting Back: Start with the larger number and count backwards the number you are subtracting. For example, to solve $12 - 3$, start at 12 and count back 3: 11, 10, 9.
  • โž• Using Addition: Think of subtraction as the opposite of addition. To solve $15 - 8$, ask yourself, "What number plus 8 equals 15?" The answer is 7.
  • ๐Ÿ–๏ธ Using Fingers: Hold up the larger number of fingers (or imagine holding them up). Then, fold down the number you are subtracting. Count the fingers remaining.
  • โž— Breaking Apart: Break the number you are subtracting into smaller, easier-to-subtract parts. For example, to solve $16 - 7$, break 7 into 6 and 1. Then, $16 - 6 = 10$, and $10 - 1 = 9$.
  • ๐Ÿ”ข Number Line: Use a number line to visualize subtraction. Start at the larger number and jump back the number you are subtracting.

๐Ÿ“ Practice Quiz

  1. What is $14 - 5$?
    1. 7
    2. 9
    3. 11
  2. What is $18 - 9$?
    1. 8
    2. 9
    3. 10
  3. What is $11 - 4$?
    1. 6
    2. 7
    3. 8
  4. What is $13 - 6$?
    1. 5
    2. 6
    3. 7
  5. What is $17 - 8$?
    1. 8
    2. 9
    3. 10
  6. What is $12 - 7$?
    1. 4
    2. 5
    3. 6
  7. What is $15 - 6$?
    1. 8
    2. 9
    3. 10
Click to see Answers
  1. B
  2. B
  3. B
  4. C
  5. B
  6. C
  7. B
โœ… Best Answer
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sharon_cantu Jan 7, 2026

๐Ÿ”ข Quick Study Guide

  • ๐ŸŽ Subtraction Basics: Subtraction means taking away a number from another. We use the minus sign (-) to show subtraction.
  • ๐Ÿ’ก Subtraction Within 20: This means that when you subtract, your answer (the difference) will always be less than 20.
  • ๐Ÿ–๏ธ Counting Back: A simple strategy is to count backwards on a number line or using your fingers. For example, to solve $15 - 3$, start at 15 and count back 3 places.
  • โž• Using Addition Facts: Subtraction is the opposite of addition. If you know that $8 + 5 = 13$, then you also know that $13 - 5 = 8$.
  • ๐Ÿ“ Number Bonds: Break down numbers into smaller parts to make subtraction easier. For example, to solve $14 - 6$, you can break 6 into $4 + 2$. Then, $14 - 4 = 10$, and $10 - 2 = 8$.

โœ๏ธ Practice Quiz

  1. What is $12 - 5$?
    1. 6
    2. 7
    3. 8
  2. What is $18 - 9$?
    1. 8
    2. 9
    3. 10
  3. What is $15 - 6$?
    1. 8
    2. 9
    3. 10
  4. What is $11 - 4$?
    1. 6
    2. 7
    3. 8
  5. What is $16 - 8$?
    1. 7
    2. 8
    3. 9
  6. What is $13 - 7$?
    1. 5
    2. 6
    3. 7
  7. What is $19 - 5$?
    1. 13
    2. 14
    3. 15
Click to see Answers
  1. B
  2. B
  3. B
  4. B
  5. B
  6. B
  7. B
โœ… Best Answer
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matthew499 Jan 7, 2026

๐Ÿ“š Quick Study Guide

    ๐Ÿ”ข Subtraction Basics: Subtraction means taking away a number from another. Think of it as removing items from a group. For example, if you have 7 apples and eat 2, you subtract 2 from 7. โž– Subtraction Symbol: The subtraction symbol is a minus sign (-). ๐Ÿ’ก Subtraction Strategies:
      ๐Ÿ–๏ธ Counting Back: Start with the larger number and count backward the number you are subtracting. ๐Ÿค Using Fingers: Use your fingers to help you count. ๐Ÿ–ผ๏ธ Drawing Pictures: Draw pictures to represent the numbers and cross out the ones you are subtracting.
    ๐Ÿ“ Subtraction Within 20: This means subtracting numbers so that the answer is always less than 20. For example, $15 - 7 = 8$.

โž• Practice Quiz

  1. What is $12 - 5$?
    1. 6
    2. 7
    3. 8
  2. What is $18 - 9$?
    1. 8
    2. 9
    3. 10
  3. What is $14 - 6$?
    1. 7
    2. 8
    3. 9
  4. What is $11 - 4$?
    1. 6
    2. 7
    3. 8
  5. What is $16 - 8$?
    1. 7
    2. 8
    3. 9
  6. What is $19 - 12$?
    1. 6
    2. 7
    3. 8
  7. What is $13 - 7$?
    1. 5
    2. 6
    3. 7
Click to see Answers
  1. B
  2. B
  3. B
  4. B
  5. B
  6. B
  7. B
โœ… Best Answer
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cole.sparks Jan 7, 2026

๐Ÿ“š Quick Study Guide

    ๐Ÿ”ข Subtraction Basics: Subtraction means taking away a number from another. The $-$ symbol tells us to subtract. ๐Ÿ’ก Subtraction Strategies:
    • Counting Back: Start with the bigger number and count backward.
    • Using Fingers: Hold up fingers and take some away.
    • Drawing Pictures: Draw objects and cross some out.
    โž• Subtraction Facts within 20: Knowing your subtraction facts helps you subtract quickly! For example, $10 - 5 = 5$. โž– Word Problems: Read carefully to find the numbers you need to subtract! Look for words like 'take away,' 'left,' and 'difference.'

๐Ÿ“ Practice Quiz

  1. What is $12 - 4$?
    1. 6
    2. 8
    3. 16
  2. What is $15 - 7$?
    1. 7
    2. 8
    3. 9
  3. What is $18 - 9$?
    1. 8
    2. 9
    3. 10
  4. What is $11 - 3$?
    1. 6
    2. 8
    3. 14
  5. What is $16 - 8$?
    1. 6
    2. 8
    3. 9
  6. What is $19 - 5$?
    1. 12
    2. 14
    3. 24
  7. What is $20 - 12$?
    1. 6
    2. 8
    3. 9
Click to see Answers
  1. B
  2. B
  3. B
  4. B
  5. B
  6. B
  7. B
โœ… Best Answer
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jayblake1990 Jan 7, 2026

๐Ÿ“š Quick Study Guide

    ๐Ÿ”ข
  • Subtraction Basics: Subtraction means taking away from a group. The symbol for subtraction is the minus sign (-).
    • ๐Ÿ’ก
  • Counting Backwards: You can subtract by counting backwards on a number line or using your fingers.
    • โž•
  • Subtraction within 20: This means you'll be subtracting numbers to get an answer that's less than or equal to 20.
    • โž–
  • Fact Families: Understanding fact families (e.g., if $5 + 3 = 8$, then $8 - 3 = 5$ and $8 - 5 = 3$) can make subtraction easier.
    • ๐Ÿ“
  • Using Manipulatives: Use objects like counters, blocks, or even drawings to visualize subtraction problems.

โœ๏ธ Practice Quiz

  1. What is $12 - 5$?
    1. 6
    2. 7
    3. 8
  2. What is $15 - 8$?
    1. 6
    2. 7
    3. 8
  3. What is $18 - 9$?
    1. 8
    2. 9
    3. 10
  4. What is $11 - 4$?
    1. 6
    2. 7
    3. 8
  5. What is $14 - 6$?
    1. 6
    2. 7
    3. 8
  6. What is $16 - 7$?
    1. 8
    2. 9
    3. 10
  7. What is $19 - 11$?
    1. 6
    2. 7
    3. 8
Click to see Answers
  1. B
  2. B
  3. B
  4. B
  5. E
  6. B
  7. E
โœ… Best Answer
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๐Ÿ“š Quick Study Guide

  • ๐ŸŽ Subtraction Basics: Subtraction means taking away one number from another. Think of it like having a certain number of apples and then eating some!
  • ๐Ÿ”ข Subtraction within 20: This means we're only working with numbers from 0 to 20.
  • โž– The Subtraction Sign: The subtraction sign looks like this: $-$. It tells us to subtract.
  • ๐Ÿ–๏ธ Counting Back: A helpful strategy is to count back on a number line or with your fingers. For example, $15 - 3$ means starting at 15 and counting back 3 numbers.
  • ๐Ÿค Using Manipulatives: You can use objects like blocks, beads, or even your fingers to help you visualize subtraction.
  • ๐Ÿ’ก Fact Families: Understanding fact families (e.g., $8 + 6 = 14$, $6 + 8 = 14$, $14 - 8 = 6$, $14 - 6 = 8$) can make subtraction easier.

Practice Quiz

  1. What is $12 - 5$?
    1. 6
    2. 7
    3. 8
  2. What is $18 - 9$?
    1. 8
    2. 9
    3. 10
  3. What is $15 - 6$?
    1. 8
    2. 9
    3. 10
  4. What is $11 - 4$?
    1. 6
    2. 7
    3. 8
  5. What is $19 - 7$?
    1. 11
    2. 12
    3. 13
  6. What is $14 - 8$?
    1. 5
    2. 6
    3. 7
  7. What is $20 - 3$?
    1. 16
    2. 17
    3. 18
Click to see Answers
  1. B
  2. B
  3. B
  4. B
  5. B
  6. B
  7. B
โœ… Best Answer
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renee569 Jan 7, 2026

๐Ÿ“š Quick Study Guide

    ๐Ÿ”ข
  • Subtraction Basics: Subtraction means taking away a number from another number. The symbol for subtraction is "-".
    • ๐Ÿ’ก
  • Subtraction Strategies:
      โž–
    • Counting Back: Start with the larger number and count back the smaller number.
      • ๐Ÿ–๏ธ
    • Using Fingers: Use your fingers to count back.
      • ๐Ÿ–ผ๏ธ
    • Drawing Pictures: Draw objects and cross them out to subtract.
      • ๐Ÿ’ฏ
    • Using a Number Line: Use a number line to visually count back.
    • โž•
  • Subtraction within 20: Practice subtracting numbers from 20 and below. For example, $15 - 7 = 8$

๐Ÿงช Practice Quiz

  1. What is $12 - 5$?
    1. 6
    2. 7
    3. 8
  2. What is $18 - 9$?
    1. 8
    2. 9
    3. 10
  3. What is $14 - 6$?
    1. 7
    2. 8
    3. 9
  4. What is $11 - 3$?
    1. 6
    2. 7
    3. 8
  5. What is $16 - 8$?
    1. 6
    2. 7
    3. 8
  6. What is $19 - 4$?
    1. 14
    2. 15
    3. 16
  7. What is $20 - 7$?
    1. 12
    2. 13
    3. 14
Click to see Answers
  1. B
  2. B
  3. B
  4. C
  5. C
  6. B
  7. B
โœ… Best Answer
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jordan.bowers Jan 7, 2026

๐Ÿ“š Quick Study Guide

  • ๐ŸŽ Subtraction Basics: Subtraction means taking away a number from another. Think of it as removing items from a group.
  • ๐Ÿ”ข Subtraction within 20: This involves subtracting numbers from each other where both numbers are 20 or less.
  • โž– Subtraction Symbol: The symbol for subtraction is a minus sign (-). For example, $10 - 3 = 7$.
  • ๐Ÿ’ก Counting Back Strategy: One way to subtract is to count back on a number line or in your head. For example, to solve $12 - 4$, start at 12 and count back 4 numbers.
  • ๐Ÿ–๏ธ Using Fingers: You can also use your fingers to subtract. If you have 15 and need to subtract 6, hold up 15 fingers and then put down 6. Count how many fingers are left.
  • โž• Relationship with Addition: Subtraction is the opposite of addition. If $8 + 5 = 13$, then $13 - 5 = 8$.
  • ๐Ÿ“ Practice Makes Perfect: The more you practice, the easier subtraction will become!

๐Ÿงฎ Practice Quiz

  1. What is $15 - 7$?
    1. 8
    2. 6
    3. 9
  2. Solve: $11 - 3 = ?$
    1. 7
    2. 8
    3. 9
  3. What is $18 - 9$?
    1. 10
    2. 9
    3. 8
  4. Calculate $14 - 6$.
    1. 7
    2. 8
    3. 9
  5. What is $12 - 5$?
    1. 6
    2. 7
    3. 8
  6. Solve: $16 - 8 = ?$
    1. 7
    2. 8
    3. 9
  7. What is $20 - 4$?
    1. 15
    2. 16
    3. 17
Click to see Answers
  1. A
  2. B
  3. B
  4. B
  5. C
  6. B
  7. B

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