Test your child's strength in double-digit subtraction and addition with this ninja worksheet. Challenge his abilities with these tricky word problems!

Practice identifying doubles facts with this appealing worksheet!

Practice adding doubles with this colorful worksheet!

Hurry! If these numbers aren't added quickly using regrouping, they'll pop!

Use this visual model to practice adding 10 to two-digit numbers!

Children practice writing numbers from expanded forms, and expanded forms from numbers.