One-digit numbers are easy to multiply. All you need to know is the multiplication table. Examples:
5 x 5 = 25
3 x 5 = 15
7 x 6 = 42
5 x 8 = 40
If for some reason you can't remember the multiplication table, you can use addition. After all, multiplication is nothing more than multiple addition operations.
To multiply, for example, the number 4 by the number 3, you need to add 4 three times:
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