Subtraction can look fluent while still being fragile. A student may know a fact, but lose track when the numbers get larger, when place value matters, or when exchanging appears before the written method is secure.
The Daily Maths Review subtraction app is designed for short practice where the teacher controls the number size and the exchange demand. That makes it useful for warm-ups, rotations and quick checks after modelling.
Start with the subtraction load
Choose the first and second number sizes to match the lesson. One digit questions can strengthen facts and counting back. Two digit questions can support place value and mental strategies. Larger questions can support written subtraction once students understand the layout.
- Use one digit questions when students need confidence and accuracy.
- Use two digit questions when place value language is the focus.
- Use three or four digit questions after students understand the written method.
- Keep the first questions achievable so students can attend to the method.
Treat exchanging as the teaching point
Exchanging should not appear accidentally when students are still learning the structure. No-exchange questions help students practise the layout. Exchange questions help them practise regrouping. Mixed questions are useful once students can decide whether an exchange is needed.
Run three no-exchange questions, model one exchange question, then let students try three exchange questions before moving to mixed practice.
Use mistakes to choose the next model
A wrong subtraction answer can point to different needs. Some students need a number line. Some need base-ten blocks. Some need to line up the digits carefully. Use the checked answers to choose the next representation, not just the next question.