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Number lines are useful tools when you are doing maths.

Year 1 Numbers - Number Lines

Use number lines to add and subtract. Count on in neat jumps, cross the tens safely, and spot the quickest path from a start number to the answer.

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(quiz starts below)

Fascinating Fact:

For 17 + 5, jump 3 to reach 20, then 2 more to 22. Like leaping puddles then pebbles.

In KS1 Maths, number lines help you see steps in addition and subtraction. You can make small jumps or bigger ones, and use friendly numbers like 10 or 20 to move faster.

Key Terms

Number line: A line with numbers in order that helps you count forwards and backwards.
Jump: A move along the number line, such as +2 or −5.
Tens boundary: A point like 10, 20, or 30 that is useful to reach before jumping on.

Practise quick number-line moves with the Addition Game before you try the quiz.

Frequently Asked Questions (Click to see answers)

How do you add on a number line in Year 1?

Start at the first number, then make forward jumps for the amount you are adding. Example: for 9 + 4, start at 9 and jump 1, 2, 3, 4 to land on 13.

What does “crossing a tens boundary” mean?

It means your jumps pass through a friendly number like 10 or 20. For 17 + 5, jump 3 to 20, then 2 more to 22 to make counting easier.

Can I use number lines for subtraction?

Yes. Start at the larger number and jump back. For 14 − 6, jump back 4 to 10, then 2 more to 8, using the tens boundary to help.

Try These Related Quizzes

Question 1

What is special about all the numbers missing from this number line?

They all end with 2

They are all odd

They are all even

They are all more than 30

These numbers are in the two times table

Question 2

All the numbers are odd

The numbers are not in the correct order

There are too many numbers

All the numbers are even

Saying the numbers aloud will sound all wrong!

Question 3

What would the last number on this part of the number line be?

Pointing to each mark and saying the number is helpful

Question 4

Which other numbers might you find on this part of the number line?

66, 67, 68

1, 3, 5

35, 37, 39

12, 14, 20

Count forwards and backwards from the centre number

Question 5

Which numbers are missing from this number line?

4, 7, 16

5, 11, 16

5, 9, 11

9, 12, 17

Say the numbers as you count up

Question 6

24, 25, 29

25, 27, 31

42, 52, 92

24, 29, 31

Look at the numbers which come before and after the blank spaces

Question 7

Which number would be found at the beginning of this number line?

Pointing and counting down aloud may help

Question 8

4, 5, 7

46, 49, 52

75, 80, 85

18, 20, 27

Count forwards and backwards from the centre number

Question 9

49, 50, 51

50, 51, 52

50, 55, 59

50, 55, 60

Look at the numbers which come before and after the blank spaces

Question 10

7, 8, 15, 20

8, 9, 15, 19

7, 15, 19, 20

4, 8, 9, 10

Counting out loud will help you fill the blanks

You can find more about this topic by visiting BBC Bitesize - What is a number line?

Author: Angela Smith (Primary School Teacher & KS1 Quiz Writer)

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