Solution - Long multiplication
45
Step-by-step explanation
1. Rewrite the numbers from top to bottom aligned to the right
| Place value | tens | ones |
| 4 | 5 | |
| × | 1 | |
2. Multiply the numbers using long multiplication method
Start by multiplying the ones digit (1) of the multiplier 1 by each digit of the multiplicand 45, from right to left.
Multiply the ones digit (1) of the multiplicator by the number in the ones place value:
1×5=5
Write 5 in the ones place.
| Place value | tens | ones |
| 4 | 5 | |
| × | 1 | |
| 5 |
Multiply the ones digit (1) of the multiplicator by the number in the tens place value:
1×4=4
Write 4 in the tens place.
| Place value | tens | ones |
| 4 | 5 | |
| × | 1 | |
| 4 | 5 |
The solution is: 45
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