Grade 1 · Year 2 · Class 1 · ages 6–7 · Number sense
One more, one less: Grade 1 practice
Finding the number that is one more or one less than a given number. Eight questions at a time, instant feedback and a mastery score from 0 to 100.
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Right answers raise your mastery score (more on harder questions) and wrong ones lower it a little. Your best score is saved on this device, and in your account if you log in.
The idea in one minute
One more is the next number when you count up, and one less is the number just before it. A number line helps.
Try these on paper first
One question at each level. Tap a question to see the answer.
Easy One less than 14 is
Answer: 13
Medium One more than 68 is
Answer: 69
Challenge One less than 246 is
Answer: 245
More ways to practise one more, one less
- Printable one more, one less worksheet with an answer key (new questions every time)
- Number Sense Lab: Explore place value, number patterns, rounding, factors and multiples with short adaptive challenges.
- Bubble Pop Maths: Pop the bubble with the right answer. 60 seconds, streaks and bonus points.
- All Grade 1 practice · Number sense worksheets
Related skills
- Greater than, less than and equal to (Grade 1)
- Skip counting (Grade 1)
- Tens and ones (place value) (Grade 1)
- Odd and even numbers (Grade 1)
Take a break
Play a game that builds the same skills
FAQ
One more, one less: questions
What grade is one more, one less?
It is usually taught in Grade 1 (Year 2 in England, Class 1 in India, ages 6–7), though schools and countries differ. Try the grade above or below if it feels too hard or too easy.
What does a one more, one less question look like?
For example: "One more than 68 is" The answer is 69. One more is the next number when you count up, and one less is the number just before it. A number line helps.
What should I learn before and after one more, one less?
Before it, try odd and even numbers (Grade 1). After it, move on to rounding to the nearest 10 (Grade 2).
How can I get better at one more, one less?
One more is the next number when you count up, and one less is the number just before it. A number line helps. Practise a little every day, read the hint after each wrong answer, and use the printable worksheet when you want to write it out.
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