Long Division Problem: Dividing 722 by 9 Step-by-Step

Long Division with Three-Digit Dividends

9722

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Solve
00:03 Let's start by dividing the leftmost digit by the divisor
00:08 7 is less than 9, so we'll add the next digit, then divide
00:14 Write the result above, pay attention to the position
00:18 Now multiply the result by the divisor
00:23 Subtract the product from the number
00:30 Now bring down the next digit and use the same steps
00:34 Divide
00:38 Write the result without remainder above, pay attention to the position
00:41 Multiply the result and subtract
00:45 We got a remainder of 2
00:50 And this is the solution to the problem

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

9722

2

Step-by-step solution

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

  • Step 1: Use long division to divide 722 by 9.

  • Step 2: Calculate the quotient and remainder during division.

  • Step 3: Verify against the given multiple-choice options.

Now, let's work through each step:

Step 1: Begin with the long division of 722 by 9.

Step 2: Breakdown the division:
- 9 goes into 72 eight times (because 9×8=729 \times 8 = 72). - Subtract 7272 from 7272, leaving 00.
- Bring down the next digit 22.
- 9 goes into 2 zero times.
- This gives a quotient of 8080 and a remainder of 22, since 80×9+2=72280 \times 9 + 2 = 722.

Step 3: Verify with choices:
- Compare the quotient 8080 and remainder 22 against the options provided.
- The correct choice is: 8080 with a remainder of 22.

Thus, the answer is that 99 goes into 722722, leaving a quotient of 80\mathbf{80} and a remainder of 2\mathbf{2}.

3

Final Answer

80 80 with a remainder of 2

Key Points to Remember

Essential concepts to master this topic
  • Division Rule: Divide from left to right, one digit at a time
  • Technique: 9×8=72 9 \times 8 = 72 , so 9 goes into 72 exactly 8 times
  • Check: Multiply quotient by divisor and add remainder: 80×9+2=722 80 \times 9 + 2 = 722

Common Mistakes

Avoid these frequent errors
  • Forgetting to bring down the next digit
    Don't stop after dividing 72 by 9 and getting 8 = incomplete answer! You must bring down the final digit (2) to complete the division. Always work through every digit in the dividend to get the complete quotient and remainder.

Practice Quiz

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216

FAQ

Everything you need to know about this question

Why does 9 go into 72 exactly 8 times?

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Because 9×8=72 9 \times 8 = 72 exactly, with no remainder! This is why we write 8 above the 7 in our quotient and subtract 72 from 72 to get 0.

What happens when I bring down the 2?

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Now you're dividing 2 by 9. Since 2 is smaller than 9, it goes 0 times. Write 0 in the quotient and 2 becomes your remainder.

How do I check if 80 remainder 2 is correct?

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Use the division check formula: quotient×divisor+remainder=dividend \text{quotient} \times \text{divisor} + \text{remainder} = \text{dividend}
So: 80×9+2=720+2=722 80 \times 9 + 2 = 720 + 2 = 722

Why isn't the answer just 8 since 72 ÷ 9 = 8?

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That's only the first step! You're dividing 722 (not just 72) by 9. After getting 8 from 72÷9, you must bring down the final digit 2 to complete the full division.

What if my remainder is bigger than the divisor?

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That means you made an error! The remainder must always be smaller than the divisor. If your remainder ≥ 9, you can divide more times.

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