The problem is that the numbers we use for multiplication and addition are not the same as the numbers we use in multiplication and addition. For example, 2 × 3 = 6, but when we add two three-digit numbers together, they become a four-digit number. This can be confusing when you’re trying to solve a problem like this one.

The solution is to use a different set of numbers that can be used both for multiplication and addition. In this case, we’ll use the multiples of 10: 0, 10, 20, 30… 90, 100. Using these numbers will let us multiply by 0 (0 × 5 = 0), add by 1 (1 + 1 = 2), multiply by 2 (2 × 3 = 6), add by 3 (3 + 3 = 6), etc. It’s important to remember that these are multiples of 10 because they are multiples of 10!

Last modified: October 3, 2022