Multiplication, Three Moves

The hardest multiplication puzzles: move three matches, and often three or even four digits change.

8 puzzles

1. 1 · No. 574Multiplication: 4 × 3 = 1019 matches · 3 moves
2. 2 · No. 575Multiplication: 5 × 4 = 7020 matches · 3 moves
3. 3 · No. 576Multiplication: 8 × 1 = 1820 matches · 3 moves
4. 4 · No. 577Multiplication: 2 × 3 = 3923 matches · 3 moves
5. 5 · No. 578Multiplication: 91 × 2 = 1522 matches · 3 moves
6. 6 · No. 579Multiplication: 3 × 82 = 3030 matches · 3 moves
7. 7 · No. 580Multiplication: 34 × 3 = 7826 matches · 3 moves
8. 8 · No. 581Multiplication: 9 × 63 = 8128 matches · 3 moves