Video Transcript
Numbers up to 10 on a Number Line.
In this video, we will learn how to use
number lines to model the counting sequence from zero to 10. This is a number line. It starts at zero and ends at number
10. And this is a jumping jellybean who’s
going to help us learn how to count from zero to 10 on a number line. Did you remember that this number line
starts at zero? So this is where we should start
counting. We’re going to count from zero to 10. Zero, one, two, three, four, five, six,
seven, eight, nine, 10.
Here’s another number line. All of the numbers are missing
though. But the numbers have been represented by
counters. The first number is shown using no
counters. So we can write the number zero on the
first digit card. Next, we can see one counter, two,
three. Did you notice we’re adding one more
counter each time? Four, five, six, seven, eight, nine,
10. The number of counters increased by one
each time. If we count the numbers from left to
right on a number line, the numbers increase. Zero, one, two, three, four, five, six,
seven, eight, nine, 10.
We can use number lines for lots of
things in maths. In this video, we’re going to use a
number line to help us compare numbers. Let’s compare the numbers four and
seven. The number four comes before number seven
on the number line. Number seven comes after number four. And we know that if we start at zero and
count from left to right on a number line, the numbers increase. They get larger. So we could say that four is less than
seven or seven is greater than four. And we can see that seven counters are
more than four counters. Seven is more than four. And four counters are less than seven
counters.
If a number comes after another number on
a number line, it means it’s greater. And if a number comes before another
number on the number line, it means it’s less. Let’s practice using number lines to help
us count and compare numbers.
Some numbers are missing from this number
line. Zero, one, two, three, what, what, six,
seven, eight, nine, 10. What number should be on the orange
card? What number should be on the blue
card?
In this question, we have to find the
missing numbers from the number line. The first missing number should be on the
orange card. And the second missing number should be
on the blue card. Let’s use the number line to help. The number on the orange card comes after
number three on the number line. Which number comes after number
three?
We could draw three counters and then one
more. We’ve drawn three counters. If we add one more, that will be
four. One, two, three, four. The number on the orange card is number
four, because four comes after three on the number line. The number on the blue card comes after
number four. We have four blue counters. So now we need one more. Four and one more is five. The number that comes after number four
is number five. Zero, one, two, three, four, five.
The number that should be on the orange
card is number four. And the number that should be on the blue
card is number five. The missing numbers are numbers four and
five.
Which is less, one or four?
We’re being asked to use a number line to
compare two numbers, the number one and the number four. Which of these two numbers is less? Number one comes before number four on
the number line. One, two, three, four. When we count from left to right on the
number line, the numbers increase. We start with the number with the least
value at the beginning of the number line. And the value of the numbers
increases. Four is worth more than one. One is worth less than four. One counter is less than four. The answer to the question “Which is
less, one or four?” is one. One is less than four.
What is one more than six?
Here’s the number six on the number
line. We have to find the number which is one
more than six. When we count from left to right on a
number line, the numbers increase. Zero, one, two, three, four, five, six,
seven. The number which is one more than six is
seven. Seven is after number six on the number
line. The number which is one more than six is
seven.
Which number line is correct?
Four, five, six, one, three, nine, seven,
two, zero, eight, 10. Zero, one, two, three, four, five, six,
seven, eight, nine, 10. Or zero, one, two, five, nine, three,
four, eight, seven, six, 10. Which of these three number lines is
correct?
Maybe you followed the numbers as you
were listening to the question. Did one sound correct? We know the first number line is not
correct. It begins with a number four and ends
with a number 10. The second and third number lines both
begin with a zero and both end with 10. Which of these is correct?
Let’s count. Zero, one, two, three, four, five, six,
seven, eight, nine, 10. This number line is correct. Let’s check the third number line. Zero, one, two, three. Oh, it says number five. That’s not correct. The number line in the middle is
correct. Zero, one, two, three, four, five, six,
seven, eight, nine, 10.
What have we learned in this video? We’ve learned that we can count from zero
to 10 on a number line. We can use number lines to help us
compare numbers. And we can use a number line to find one
more or one less than a number.
