Vertical Multiplication: 631 × 316 =

Multi-Digit Multiplication with Vertical Algorithm

631316x

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:07 Let's solve a multiplication problem step by step.
00:11 We will tackle each part separately using long multiplication.
00:15 First, let's multiply the ones place. Let's go!
00:19 Now, multiply the tens place with the ones.
00:23 Remember to place the ones and carry 1 if needed.
00:27 Next, multiply the hundreds place by the ones.
00:30 Don't forget: multiplication comes before addition or subtraction.
00:35 Now, let's handle multiplying ones by tens.
00:38 Great! Now, multiply tens with tens.
00:42 And, multiply hundreds by tens. Keep going!
00:48 Now it's time to multiply ones by hundreds.
00:55 Then, move on to multiplying tens by hundreds.
01:00 Finally, let's do hundreds multiplied by hundreds. Almost there!
01:09 Now, add up all these results together.
01:15 And remember, add any carried numbers where needed.
01:30 And that's how you solve the multiplication problem! Well done!

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

631316x

2

Step-by-step solution

To solve this problem, we will multiply the two numbers step by step:

  • Step 1: Multiply the bottom number, 316, by each digit of the top number, 631, starting from the rightmost digit 1.

  • Step 2: Align each resulting product according to its place value.

  • Step 3: Sum all the aligned products to find the final result.

Let's carry out the multiplication:

631×6=3786, (align under the hundreds place)631×1=631, (align under the tens place)631×3=1893, (align under the units place) \begin{aligned} 631 \times 6 &= 3786, \text{ (align under the hundreds place)}\\ 631 \times 1 &= 631, \text{ (align under the tens place)}\\ 631 \times 3 &= 1893, \text{ (align under the units place)} \end{aligned}

Now, add these products together:

+3786+06310+189300199396 \begin{aligned} &\phantom{+}3786\\ &+ \phantom{0}631\phantom{0} \\ &+ 1893\phantom{00} \\ \hline &199396 \end{aligned}

Therefore, the product of 631 and 316 is 199396 199396 .

3

Final Answer

199396 199396

Key Points to Remember

Essential concepts to master this topic
  • Alignment: Each partial product must align to correct place value
  • Technique: 631 × 6 = 3786, positioned at hundreds place
  • Check: Add partial products 3786 + 6310 + 189300 = 199396 ✓

Common Mistakes

Avoid these frequent errors
  • Incorrect alignment of partial products
    Don't place all partial products in the same column = wrong final answer! This ignores place value and gives answers like 6310 instead of 199396. Always align each partial product according to the digit position you're multiplying by.

Practice Quiz

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FAQ

Everything you need to know about this question

Why do I need to shift the partial products over?

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Each digit in the bottom number represents a different place value. The 6 in 316 is actually 6 × 100 = 600, so 631 × 6 must be positioned in the hundreds place!

What order should I multiply the digits?

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Start with the ones digit (6), then tens (1), then hundreds (3). This keeps your partial products organized and prevents alignment errors.

How do I know where to place each partial product?

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  • 631 × 6 (ones): no shift
  • 631 × 1 (tens): shift left one place
  • 631 × 3 (hundreds): shift left two places

Can I multiply in a different order?

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Yes, but it's easier to go right to left (ones, tens, hundreds). This matches how we naturally read numbers and reduces confusion with place values.

What if I get different partial products?

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Double-check your basic multiplication: 631 × 6 = 3786, 631 × 1 = 631, 631 × 3 = 1893. If these are wrong, your final answer will be wrong too!

How can I verify my final answer is correct?

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Use a calculator to check 631×316=199396 631 \times 316 = 199396 , or try the reverse operation: 199396 ÷ 316 should equal 631.

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