Solution - Long multiplication
20
Step-by-step explanation
1. Rewrite the numbers from top to bottom aligned to the right
| Place value | tens | ones |
| 4 | ||
| × | 5 | |
2. Multiply the numbers using long multiplication method
Start by multiplying the ones digit (5) of the multiplier 5 by each digit of the multiplicand 4, from right to left.
Multiply the ones digit (5) of the multiplicator by the number in the ones place value:
5×4=20
Write 0 in the ones place.
Because the result is greater than 9, carry the 2 to the tens place.
| Place value | tens | ones |
| 2 | ||
| 4 | ||
| × | 5 | |
| 2 | 0 |
The solution is: 20
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