# Lesson Video: Dividing by 2 Mathematics • 3rd Grade

In this video, we will learn how to use various strategies to divide by 2 within 24, including using models and the times table facts.

08:56

### Video Transcript

Dividing by Two

In this video, we’re going to use various strategies to divide by two, including using models and the times table facts.

Here, we have a group of six acorns and two squirrels. How can we share the acorns equally between the two squirrels? We could share the acorns into two equal groups because there are two squirrels. Each group contains three acorns. We had six acorns. We divided them into two equal groups. Each group contains three acorns. We could also divide the acorns into groups of two. If we divide our six acorns into groups of two, there are three groups. We would still say that six divided by two equals three. We made two groups of three and three groups of two.

Another way to calculate six divided by two is to use a number line. If we started at six, how many jumps of two do we need to make to get back to zero? In other words, how many twos are there in six? One, two, three. We counted back in twos from six three times. Six divided by two equals three.

We can also use our knowledge of the two times table to help us divide. We know that one times two is two, two times two is four, and three times two is six. We can skip count forward by two three times because there are three twos in six.

We’ve learnt lots of different strategies to help us divide by two. We could divide into two equal groups. Another way to divide by two is to divide into groups of two. We used our knowledge of the two times table. We counted forward on the number line in twos three times. We also used repeated subtraction, counting back in twos. We’ve learned lots of different strategies to help us divide by two. Let’s try practicing these strategies with some questions.

Complete the following. Four divided by two equals what.

In this question, we’re being asked to find the missing quotient. This is the result we get when we divide four by two. Here are four squares. We need to divide them by two. We’ve made two equal groups, and each group contains two squares. Four divided by two equals two.

Fill in the missing quotient. 16 divided by two equals what.

In this question, we have to find the missing quotient. This is the result we get when we divide 16 by two. To help us find the missing quotient, we could use a number line. We could start at 16 and count back in twos until we reach zero. 16, 14, 12, 10, eight, six, four, two, zero. How many times did we count back or subtract two? One, two, three, four, five, six, seven, eight times. 16 divided by two equals eight. The missing quotient is eight.

Find the missing quotient. What is equal to 14 divided by two?

In this question, we have to find the missing quotient. We know the quotient is equal to 14 divided by two. So, to find the quotient, we need to divide 14 by two with a model 14 divided by two using 14 counters. And we’re dividing by two, so we can divide our counters into groups of two. One, two, three, four, five, six, seven. 14 divided by two equals seven. We divided our 14 counters into groups of two. There were seven groups. The missing quotient is seven.

Complete: What divided by two equals nine.

In this question, we have to find the missing dividend. This is the number which we have to divide by two. What number divided by two is equal to nine? We know when we divide our missing number by two, the quotient or the result is nine. This means there are nine twos in the missing number. So, if we multiply two by nine, we’ll find the missing number. What is two times nine? One times two is two, two times two is four, three times two is six, four times two is eight, five times two is 10, six times two is 12, seven times two is 14, eight times two is 16, and nine times two is 18. Nine twos are 18.

So, the missing dividend is 18. 18 divided by two equals nine. We used our knowledge of the two times table to help. Two times nine is 18. So, 18 divided by two equals nine. The missing number is 18.

What have we learned in this video? We’ve learned how to use different strategies to help us divide by two. One way to divide by two is to divide into two equal groups. Another way to divide by two is to divide into groups of two. We also learned how to use our knowledge of the two times table to divide by two. We also learned how to use number lines to help us count forward in twos or count back in twos to divide by two. We used lots of different strategies to divide by two.