Did you know that multiplying a number by two is the same thing as adding that number to itself? Use this trick in this lovely math worksheet.

Not only does this worksheet bolster kids' addition skills, it's a great mental math exercise, too.

Practice addition with your second grader, a math worksheet, and a deck of playing cards.

Is your math whiz up to the challenge? She'll have to use logic and reasoning skills to solve this tricky addition puzzle!