Video Transcript
Making Five
In this video, we will learn how to
use models and addition equations to show different ways to make the number
five. We can make the number five in
different ways. How many different cube trains
could we make using orange and pink cubes? We could make a cube train using
five orange cubes. One, two, three, four, five.
We could write down how many orange
cubes and how many pink cubes we used to make our cube trains. This will help us make sure that we
don’t make the same cube train twice. We made our cube train using five
orange cubes and no pink cubes. We could also make a five train
using four orange cubes and one pink.
Have you spotted the pattern? Can you predict which cube train
will be next? Five, four, five, four, three. The number of orange cubes is
decreasing. We’re taking away one each
time. How many pink cubes will there
be? Zero, one, two. The numbers are increasing. We’re adding one pink cube each
time. Five and zero, four and one, three
and two. Can you use the pattern to predict
what the next pair of numbers will be?
Five, four, three, two. How many pink cubes should there
be? Zero, one, two, three. Two orange cubes and three pink
cubes makes five. The next pair would be one orange
cube and four pink. One and four makes five. And our final pair of numbers that
make five are zero and five. Five and zero, four and one, three
and two, two and three, one and four, and zero and five are all pairs which make
five. Did you spot the pattern?
Five, four, three, two, one, zero,
zero, one, two, three, four, five. We found six different ways to make
a five train. Let’s practice some questions now
using models to find different ways to make five.
Choose the sum that equals
five. Is it one plus two, one plus three,
two plus three, one plus one, or two plus two?
Does one and two equal five? Let’s make a cube train to find
out. One add two makes three. One, two, three. We know that one and two doesn’t
make five because we still have two of our five cubes left over and two spaces in
our five frame. Does one and three make five? We added one and then two.
To find the total of one and three,
we just need to add one more cube to our train. One and three doesn’t make five
either. We still have one of our five cubes
left over. Does two and three make five? We know that one and three makes
four. And we know that two is one more
than one. Two and three does make five. The sum that equals five is two
plus three.
Find the missing number. Four plus one is five. Three plus two is what?
We know that four orange stars and
one green star is five. The second picture shows three
orange stars and two green stars. But we’re not told the total number
of stars. Let’s put all of the stars together
in a five frame. One, two, three orange stars and
two green stars. How many stars are there in
total?
Well, we don’t need to count them
because the five frame is full. Three plus two is five. The missing number is five. Four and one is five, and three and
two is five.
Use the blocks to help you answer
the questions below. Fill in the blank. Two and three make what? Which number bond is correct? Whole five, part two, and part
three. Or whole two, part five, and part
three. Or whole two, part five, and part
three.
The question tells us to use blocks
to help us answer the questions. And the first question asks us to
find the total of two and three. The model shows two red blocks and
three blue blocks. How many blocks are there in
total? Let’s count them. One, two, three, four, five. Two and three is five.
The second part of the question
asks us to find the number bond which is correct. Which of these three number bonds
shows us that two and three make five? Well, we already know that the
whole part or the total should be five. The whole part of the first number
bond is five. The whole part of the other two
number bonds is two, which is not correct. The total of two and three is
five.
Let’s check if the rest of the
number bond is correct. We know that part of our model
shows two red cubes. And the second part of the model
shows three blue cubes. Two and three make five. The correct number bond shows us
that two and three equals five.
What have we learned in this
video? We’ve learned that we can use
models to help us find different ways to make five. We’ve also learned that we can
record our system to help us find all the possible answers. And we also learned that we can
record different ways to make five using a part–whole model.
