Solution - Long multiplication
81
Step-by-step explanation
1. Rewrite the numbers from top to bottom aligned to the right
| Place value | tens | ones |
| 9 | ||
| × | 9 | |
2. Multiply the numbers using long multiplication method
Start by multiplying the ones digit (9) of the multiplier 9 by each digit of the multiplicand 9, from right to left.
Multiply the ones digit (9) of the multiplicator by the number in the ones place value:
9×9=81
Write 1 in the ones place.
Because the result is greater than 9, carry the 8 to the tens place.
| Place value | tens | ones |
| 8 | ||
| 9 | ||
| × | 9 | |
| 8 | 1 |
The solution is: 81
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