Partial products
Helps you see every piece of a long multiplication before adding them up.
Step 1Split 135 into 100 + 30 + 5 and 89 into 80 + 9.
Step 2Multiply each part of 89 by each part of 135, starting with the ones.
- 9 × 5 = 45
- 9 × 30 = 270
- 9 × 100 = 900
- 80 × 5 = 400
- 80 × 30 = 2,400
- 80 × 100 = 8,000
Step 3Add the partial products: 45 + 270 + 900 + 400 + 2,400 + 8,000 = 12,015.
Step 4So 135 × 89 = 12,015.