How to explain section c, larger number lines in number lines to your child: Example question
30 October 2026
Children often see number lines with small numbers, but sometimes the numbers get much bigger. It's important to know how to find and mark larger numbers on these lines. This example helps your child see how to spot a number like 250 on a number line that goes from 200 to 300, using clear steps.
Worked example
Question: Mark 250 on a number line that starts at 200 and ends at 300. The line has marks for every 10.
Step 1: Look at the start (200) and end (300) of the number line.
Step 2: Each mark is 10 more than the last. So the marks are 200, 210, 220, 230, 240, 250, 260, 270, 280, 290, 300.
Step 3: Find 250. Start at 200 and count up in tens: 200, 210, 220, 230, 240, 250.
Step 4: Mark 250 on the line. It is halfway between 200 and 300.
The correct answer is: 250 is the sixth mark after 200.
After working through this example, your child will recognise how to use the marks on a larger number line and find any number that fits the pattern. The next practice question will give them a chance to try this skill themselves.
