Secret codes and ninjas make everything more interesting, including subtracting 4-digit numbers!

What kind of music do stones listen to? Solve these four-digit subtraction problems to find out.

This subtraction worksheet gets your child to solve problems to answer a tricky riddle. Find out the answer to "What kind of room has no windows or doors?"

What do you call it when one lemon helps out another? Find the answer in this subtraction riddle worksheet.