Solve the Subtraction Problem: 17 Units Minus 8 Units

Basic Subtraction with Two-Digit Numbers

What do you get if you subtract 8 units from 17 units?

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Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

What do you get if you subtract 8 units from 17 units?

2

Step-by-step solution

To solve this problem, we'll follow these steps:

  • Identify the minuend and subtrahend.
  • Perform the subtraction operation.
  • Verify the result with the provided answer choices.

Now, let's work through each step:
Step 1: The given numbers are 17 (minuend) and 8 (subtrahend).
Step 2: Using the subtraction formula, we calculate 178=9 17 - 8 = 9 .
Step 3: Cross-reference the result with the provided answer choices to ensure it matches choice 4, which is 9.

Therefore, the solution to the problem is 9 9 .

3

Final Answer

9 9

Key Points to Remember

Essential concepts to master this topic
  • Operation: Identify the minuend (17) and subtrahend (8) clearly
  • Technique: Calculate 178=9 17 - 8 = 9 using mental math or number line
  • Check: Verify by adding: 9+8=17 9 + 8 = 17

Common Mistakes

Avoid these frequent errors
  • Confusing which number to subtract from which
    Don't subtract 17 from 8 = -9! This reverses the order and gives a negative result when the answer should be positive. Always subtract the smaller number from the larger number as stated in the problem.

Practice Quiz

Test your knowledge with interactive questions

If we have 67 blocks in total, how many blocks will remain if we remove 5 tens and 4 ones?

FAQ

Everything you need to know about this question

What's the difference between minuend and subtrahend?

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The minuend is the number you start with (17), and the subtrahend is the number you take away (8). Think: minuend minus subtrahend equals difference.

How can I do this subtraction quickly in my head?

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Try counting up from 8 to 17! Count: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17. That's 9 steps, so the answer is 9.

Why do I need to check my answer?

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Checking prevents mistakes! If 178=9 17 - 8 = 9 is correct, then 9+8 9 + 8 should equal 17. This backward check catches errors.

What if I get confused about the order of numbers?

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Remember: the problem says "subtract 8 from 17," which means 17 is first. Write it as 178 17 - 8 , not the other way around.

Are there other ways to solve this?

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Yes! You can use a number line (start at 17, jump back 8 spaces), counting backwards (17, 16, 15, 14, 13, 12, 11, 10, 9), or mental math.

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