Once you have exchanged, you now have 12 tens take away 3 tens. 12 − 3 = 9 If you can subtract two 4-digit numbers from each other, then you can use the same method to subtract using larger numbers.

Complete this quiz to understand how to subtract with up to four-digit numbers. Then put your knowledge to the test. When you use the column method to subtract two numbers, the larger number goes ...