If you can subtract two 3-digit numbers from each other, then you can use the same method to subtract two 4-digit numbers. You use the same method, no matter how many digits are in the numbers.

Students go over addition and subtraction with regrouping using different strategies.

Find out about the column method to subtract more than 4-digit numbers with this Year 5 article from BBC Bitesize.

In fourth grade, students focus most on using all four operations - addition, subtraction, multiplication, and division - to solve multi-step word problems involving multi-digit numbers. Fourth ...