When you multiply 9 × 9, it means you’re adding the number 9 to itself 9 times:
9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 = 81
Multiplication is a quicker way to perform repeated addition, so 9 × 9 = 81.
When you multiply 9 × 9, it means you’re adding the number 9 to itself 9 times:
9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 = 81
Multiplication is a quicker way to perform repeated addition, so 9 × 9 = 81.