Addition Games

One More, One Less Games Online Free

Find the number that’s 1 more or 1 less than a number from 1 to 30. One more is the next number; one less is the number before.

Choose a mode

Type answers on your keyboard, or tap the number pad.

What does one more and one less mean?

One more than a number is the next number when you count up: 1 more than 8 is 9. One less is the number just before it: 1 less than 8 is 7.

It’s the start of adding and subtracting. After this, try adding 0 and 1, then counting on and counting back. For bigger numbers, there’s 10 more, 10 less.

More addition games

See all addition games →

How to play One More, One Less

  1. Choose the 60-second challenge or untimed practice, then press Start.
  2. Type each answer on your keyboard or tap the number pad. It’s checked as soon as you’ve typed enough digits, or press ✓.
  3. Get one wrong and you’ll see the right answer, and the question comes back a little later.
  4. At the end, check your score and the facts to practise again.

One More, One Less skills

  • Finding 1 more than a number
  • Finding 1 less than a number
  • Counting forwards and backwards to 30

Level: Kindergarten–Grade 1 (ages 5–7)

Tips for one more and one less

“More” means count forward one step. “Less” means count back one step.

Use a number line: put your finger on the number and move one step right for more, one step left for less.

Watch the tens: 1 more than 19 is 20, and 1 less than 20 is 19.

One More, One Less questions and answers

What grade learns one more and one less?

One more and one less within 10 or 20 is taught in kindergarten and Year 1, and first graders find 10 more and 10 less within 100.