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Grade 1 · Maths · Lessons
Count on, count back
➡️count on⬅️count back🐸hops🔢number line
Count on, count back.
The big ideaStart on the first number. Count on to add, back to take away.

How it works

Start on the first number. Don't count it.

To add, count on. To take away, count back.

Say each number as you hop.

45678910back 3startend
9 − 3: start on 9 and count back 3.

Example 1: Count on

  1. 8 + 2 = ?
  2. Start on 8.
  3. Hop on: 9, 10.
  4. So the answer is 10.

Example 2: Count back

  1. 9 − 3 = ?
  2. Start on 9.
  3. Hop back: 8, 7, 6.
  4. So the answer is 6.

Example 3: Count back from a big number

  1. 18 − 3 = ?
  2. Start on 18.
  3. Hop back: 17, 16, 15.
  4. So the answer is 15.

Words to know

count on
Say the next numbers to add.
count back
Say the numbers going down to take away.

Watch out

Try it

  1. 13 − 1 = ?
  2. 15 + 3 = ?
  3. 17 − 3 = ?
Answers: 1. 12 · 2. 18 · 3. 14
For grown-upsHop along a line of paper numbers on the floor, counting on and back.
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