# Question Video: Multiplying by 2 Using Repeated Addition Method Mathematics • 3rd Grade

Try the following method to calculate multiplications by 2. 2 × 4 = 4 + 4 = 8 Complete the following: 2 × 5 = 5 + 5 = ＿. Use the same method to complete the following: 2 × 6 = ＿.

02:36

### Video Transcript

Try the following method to calculate multiplications by two. Two times four equals four plus four, which equals eight. Complete the following: Two times five equals five plus five, which equals what. And then, use the same method to complete the following: Two times six equals what.

In this question, we’re shown several calculations to do with multiplying by two. But we can’t just find the answer however we like. We’re shown a method or a way of doing things. And once we’ve understood it, we need to try it for ourselves to help us find the answers. To begin with then, we’re shown an example. And this example is all about finding out two times four.

What does this mean? Well, one way we can think of this is as two groups of four. Here’s one group of four. Now, we have two groups of four. We could write this as the addition four plus four. We could even say double four. And we know that four plus four, or double four, is equal to eight. So, we’ve used this doubling fact to help us find that two times four equals eight.

Now that we understand this doubling method, we can use it again to help us fill in the blanks in these other calculations. Two times five is the same as two groups of five or five plus another five. And we know that five plus five, or double five, equals 10. That’s how we know two times five equals 10.

Finally, we need to find the answer to two times six. Two times six is the same as two groups of six or six plus six. And we know that six plus six, or six doubled, equals 12. So, two times six equals 12.

In this question, we recognized that multiplying numbers by two is the same as doubling them. And so, we’ve used addition facts to help us solve multiplication facts. Two times five is the same as five plus five, which equals 10. Two times six is the same as six plus six, which equals 12. Our two missing numbers are 10 and 12.

Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy.