← Methods
Left-to-Right Multiplication
Split one factor into its tens and its ones, multiply each part on its own, then add the two answers together. Long multiplication without the paper.
When it works
Two digits by two digits, when neither side has a shortcut of its own.
Worked through
43 × 27 = 1161
- 43 × 20 = 86020 of them.
- 43 × 7 = 3017 of them.
- 860 + 301 = 1,161Add the parts back together.
10 problems, every one of them this method.