Crack the code of the missing starting number with this investigative subtraction worksheet!

Each Christmas gift in this math and coloring worksheet contains an addition or subtraction problem that helps your child crack the color 'code.'

Subtract the numbers to find the difference, then color code the answer for odd or even.

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

Use math to solve an international mystery! Where in the world is the super secret location?

Help Santa color his gifts. With some math know-how and a few festive crayons, your child just might save Christmas.

Where in the world is the mysterious location this time? Solve the addition problems to decipher the secret city, country and continent!

See subtraction success with a fun practice sheet! Beginners will review basic subtraction facts as they unlock a hidden fun fact at the bottom of the page.

Ready for another round of where in the world? Be an international math detective as you solve addition problems to discover the secret location!