The diagram above is a number line. A number line shows numbers in order. A number line
has arrows because it keeps going and going in both directions. All numbers can be shown
on a number line.
Fill in the missing numbers on the number lines below.
<--0-- -- -- -- -- -- -- -- -- --10-->
<--9-- -- -- -- -- -- -- -- -- --19-->
<--17-- -- -- -- -- -- -- -- -- --27-->
You can use a number line to add and subtract numbers.
For example, to find the sum of 5 and 6, first find the 5 on the number line, then move
to the right 6 numbers. You end on the number 11. So, 5 + 6 = 11.
Use the number line below to find the sum of two numbers.
4 + 4 =
3 + 5 =
1 + 4 =
2 + 7 =
5 +
= 8
2 +
= 5
+ 6 = 9
+ 4 = 7
You can use number lines to subtract. To find the difference between 9 and 4, start on
the nine and move to the left 4 numbers. You end on the number 5. The difference between 9
and 4 equals 5 or 9 - 4 = 5.
Use the number line below to find the difference between two numbers.
9 - 5 =
8 - 4 =
7 - 3 =
6 - 2 =
- 7 = 2
- 4 = 2
- 3 = 5
- 6 = 7
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