Multi-Digit Multiplication
Study by topic — one focused page each
Multiply 4-Digit by 1-Digit
Multiplying a 4-digit number by a 1-digit number means repeated addition . We use the column method (standard algorithm) with carrying. Steps: Align n…
Start this topic → 2Multiply 2-Digit by 2-Digit (Area Model)
When multiplying by a 2-digit number, we split it into two parts and multiply separately, then add the partial products . Area Model: Break both numbe…
Start this topic → 3Estimate Products Before Calculating
Estimation helps us check if our answer is reasonable. We round numbers to a convenient value before multiplying. How to Estimate: Round each number t…
Start this topic →Chapter-wide tests
Online Test
10 MCQ • 15 min
IMO / Olympiad Practice
Olympiad level • 12 min
📝 Full Chapter Test (Download & Print)
35 marks • 75 min • with answer key