← Progression Step 3 · Ages 8–11
Mathematics
Written Methods & Checking
Column addition/subtraction, short multiplication and estimating.
Written methods need place-value understanding and a habit of checking.
Column methods
Line up place values. Exchange carefully when needed.
Estimate first
Round to check if the answer is sensible.
Inverse
Check subtraction with addition; division with multiplication.
Estimate 198 × 4.
About 200×4=800 – then calculate precisely.
Practice
1. Why line up digits in columns?
2. How check 45 − 18 = 27?