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.
