In the last lessons, you learned how to multiply 1-digit numbers by 2-digit numbers and 3-digit numbers, too.
You used the column method.
In this lesson, we'll multiply even bigger numbers.
Let's solve an example together.
9,403 × 2 = ?
First, write the problem in column form, like this:
Now, let's multiply each digit of the top number by the bottom number.
First, let's multiply the digits at the Ones place.
Then, the digit at the Tens place.
Next, the digit at the Hundreds place.
And lastly, the digit at the Thousands place.
So,
9,403 × 2 = 18,806
Well done! 👏
Let's try one more example.
6,174 × 5 = ?
Do you remember the steps?
First, write the numbers in column form.
Now, multiply each digit in the top number by the bottom digit.
First, multiply the digit at the Ones place (and move the carry to the next place value.)
Next, multiply the digit at the Tens place (and add the previous carry to the product).
Now, multiply the digit at the Hundreds place.
And finally, multiply the digit at the Thousands place.
So,
6,174 × 5 = 30,870
Congratulations! 🎉
You now know how to multiply 1-digit numbers by 4-digit numbers.
Now, let's practice.