1 to 4 digits
Choose the size of the first and second number so the question is reachable and still useful.
Free maths practice app
Subtraction practice app
A quick classroom-ready app for subtraction facts, written subtraction, exchange choices and instant feedback.
Exchange options
Use no-exchange, exchange or mixed questions when students are ready for regrouping practice.
Instant feedback
Students check an answer, see whether it is correct and move straight to the next question.
Simple keypad
Large number buttons keep the focus on subtraction rather than typing or device keyboards.
What students practise
The app is built for short, focused subtraction fluency practice with numbers that can be adjusted quickly.
- subtraction facts with small numbers
- two, three and four digit written subtraction
- questions with and without exchanging
- reading the equation and entering the missing difference
- checking and correcting answers immediately
How it fits a lesson
Use it as a warm-up, an iPad station, a quick fluency check, or a calm practice option after explicit modelling.
- choose the first and second number sizes before students begin
- start with no-exchange questions when the written layout is new
- switch to exchange or mixed questions once students are ready
- use wrong answers to decide whether students need a number-line model, place-value model or written example
Why it helps
Subtraction fluency builds when students practise at the right level and get feedback before mistakes become habits.
- keeps the task focused on one operation
- makes exchanging a deliberate practice choice
- supports repeated practice without creating a worksheet pile
Frequently Asked Questions
Is the subtraction app free?
Yes. Students, teachers and families can open the subtraction app in a browser for free.
Can students choose easier or harder numbers?
Yes. The app lets you choose one, two, three or four digit numbers for each part of the question.
Does it include exchanging?
Yes. Teachers can choose no-exchange, exchange or mixed questions depending on what students are practising.
Does it replace explicit teaching?
No. It is designed for practice after students have seen the subtraction strategy or written method modelled.