Cryptic Math Puzzles, Cryptarithms

Try you hand at these alphametics.

The first few have explanations which gives you some clues on how to solve this type of puzzle. When you get to the multiplication puzzles, the first few of them also have the explanation.

Rules

Each letter stands for a unique digit. The same letter stands for the same digit throughout the puzzle. Different digits are different letters. There are no leading zeros.

Click on a puzzle to get the answer.