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Grade 1 · Maths · Lessons
Ten more, ten less
🔟ten⬆️more⬇️less🔢tens digit
Ten more, ten less.
The big ideaTen more or ten less moves the tens digit. The ones stay.

How it works

Ten more makes the tens digit go up by one.

Ten less makes the tens digit go down by one.

The ones digit stays the same.

45505560657075+105565
Ten more than 55.

Example 1: Ten more

  1. ten more than 55 is ?
  2. Look at the tens digit.
  3. Make it one bigger. The ones stay.
  4. So the answer is 65.

Example 2: Ten less

  1. ten less than 79 is ?
  2. Look at the tens digit.
  3. Make it one smaller. The ones stay.
  4. So the answer is 69.

Example 3: Ten more across a ten

  1. ten more than 16 is ?
  2. 16 has 1 ten and 6 ones.
  3. Ten more is 2 tens and 6 ones.
  4. So the answer is 26.

Words to know

ten more
Add one ten.
ten less
Take away one ten.

Watch out

Try it

  1. ten more than 60 is ?
  2. ten more than 26 is ?
  3. ten more than 49 is ?
Answers: 1. 70 · 2. 36 · 3. 59
For grown-upsUse a hundred chart and move one row up or down.
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