Ten pupils stand at the front holding number cards 1 to 10, making a human number line. Where does 0 belong, and why at that end?
Now the children in the line turn their cards around, all except 5 and 10. Can we still work out every hidden number? How do we know?
Here is a number line. Each hop is one more.
5 is in the middle. It is our landmark.
Find 3. Start at 0. Hop, hop, hop: 1, 2, 3.
Find 7. Start at 5. Hop, hop: 6, 7.
One more than 5. Start at 5. One hop on. We land on 6.
One less than 9. Start at 9. One hop back. We land on 8.
Now we find numbers on a line where only 0, 5 and 10 have names. One pupil drags the marker, and everyone else counts the steps out loud.
We will find 4, then 8, then 1, then 9. Before the marker moves, we say where to start: at 0, at 5 or at 10?
Place the number
On your Number lines sheet:
- On the first line, ring 3, 7 and 10.
- On the second line, start at 6 and draw one hop forward. Ring where you land: one more than 6.
- On the third line, start at 9 and draw one hop back. Ring where you land: one less than 9.
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