Multiplying 2- and 3-Digit Numbers

Learn all about multiplying two-digit numbers and multiplying three-digit numbers in this free lesson, which includes practice problems.

Multiplying large numbers

On the past few pages, you've practiced multiplying large numbers with small ones. What happens when you have to multiply two large numbers?

For example, imagine that your cell phone bill is $43 a month. There are 12 months in a year, so to find out how much you pay for your phone every year, you could solve for 43 x 12. You'd write the expression like this:

This problem might look hard at first, but don't worry. If you can multiply small numbers, you can multiply large ones too. All you have to do is divide this large problem into a few smaller ones. As always, you can use your times table to help.

Try this!

Stack and multiply these two-digit numbers. Then, check your answer by typing it in the box.

33 x 21 =
52 x 17 =
81 x 34 =

Multiplying two 3-digit numbers

Multiplying large numbers always works the same way, no matter how many digits the numbers have. When you're multiplying, be careful about writing the numbers in the correct places. Let's look at a problem with two 3-digit numbers to see how this works with even larger numbers.

What a huge number! If that problem seemed complicated, don't worry. You'll rarely need to multiply such large numbers. When you do, you can always use a calculator. Still, it's good to know how. If you can multiply these problems, you can multiply anything.