Horizontal Mixed Addition and Subtraction Using Numbers Between 1 and 100

Strengthen your class's understanding of place value with this series of base-ten flash cards. Including illustrations representing a variety of numbers from 13 to 94, this resource can be used in many different ways...

Number lines are a great way to help scholars grasp basic addition when it's still a new concept. This worksheet offers them 10 chances to practice this association. The first five have an addition equation and a number line; learners...

Help your class discover the commutative property of addition with this exploration of the addition table. By folding and coloring the table, a symmetry is found that directs students to an understanding of this crucial mathematical...

Learning two-digit addition isn't about memorizing steps, it's about understanding place value. Support the development of your class's number sense with these addition mats that help children break apart two-digit numbers into tens and...

Math games, especially in the primary grades, provide great opportunities for developing the number sense of young mathematicians. Working in pairs with a deck of single-digit cards, students take turns drawing two cards and reading the...

Adding and subtracting 100 is a breeze once scholars understand the role place value plays in this math process. They examine four examples before adding 100 to 24 numbers and subtracting 100 from 24 more. If you haven't yet covered...

Adding double-digit numbers can seem difficult for some students. But, this Khan Academy video makes this process clear in a developmentally sound way. Students watch as 'Sal' adds the number 46 to 43. He references each number by its...

Zoe needs to back up her music collection, but do her friends have enough space on their computers to help? Find out as you teach your class how to add two- and three-digit numbers with regrouping. Place value is emphasized as both the...

Second and third graders practice subtracting problems with one digit, two digit, and three digit numbers. They complete 80 subtraction problems.

Developing fluency with basic addition and subtraction is fundamental to the success of all young mathematicians. This four-day lesson series begins with learners using ten-frames and hundreds charts to recognize patterns when adding and...