Multiplying by 3 uses a “double plus one more” strategy, based on knowing the doubles facts. For example, 3 x 6 = double 6 + 6 = 12 = 6 = 18.
These facts can be extended to other numbers, such as tens. So, for example, 50 x 3 = 5 tens x 3 = 15 tens = 150.
Extended division facts are handled in a similar fashion, thinking of the basic facts and then thinking in a new place. For example, 180 divided by 3 = 18 tens divided by 3 = 6 tens.
