What is 47 * 53?
What is 47 * 53?
Approach: (50-3)(50+3).
2491. 2500 - 9 = 2491.
Follow-up: What is 46 * 54?
Key concepts: difference of squares.
What is 47 * 53?
Approach: (50-3)(50+3).
2491. 2500 - 9 = 2491.
Follow-up: What is 46 * 54?
Key concepts: difference of squares.