Semi-formal multiplication
Semi-formal multiplication helps children practise multiplying a two-digit number by a one-digit number using an extended form before the standard algorithm. Read the short guide and look through the examples before choosing online practice or a printable worksheet.
How to solve this
- Semi-formal multiplication breaks a multi-digit number into parts and multiplies each part separately: 34 × 6 = (30 × 6) + (4 × 6) = 180 + 24 = 204.
- Write each partial product on its own line; this keeps the place values clear.
- Check: estimate with rounded numbers first (30 × 6 = 180) and confirm the exact answer is close.
Examples
34 × 6 (semi-formal)
204
42 × 5 (semi-formal)
210
Android app
Times Divide
Multiplication and division worksheets that follow what the child has already solved.
The app does not generate PDF sheets at random. It uses the child’s previous results, including offline sheets, so the next practice can focus on what still needs work.
- Generate printable PDFs from the child’s history.
- Enter solved offline sheets quickly after practice.
- The app shows each answer; you mark it correct or not.
Scan with a phone to open Google Play