In this Subtraction as an Unknown Addend Activity, students find the unknown whole number in addition and subtraction equations up to 20.

In this Popcorn Mental Math Activity, students mentally add and subtract 10 or 100 to a given number 100–900.

In this Add and Subtract with Frogs Activity, students add and subtract within 1000, using concrete models or drawings and strategies.

Using Pirate Addition to 12 Activity, students match addition equation cards with sum cards to build addition fact fluency skills.

Using Subtraction Within 5 Activity, students solve single digit subtraction problems to build subtraction fact fluency.

In this Ice Fishing Addition Subtraction Within 100 Activity, studentsuse addition and subtraction within 100 to solve word problems involving lengths that are given in the same units.

In this Finding 10 More 10 Less Activity, students practice finding 10 more and less than a given number to build skip counting and base ten skills.

Using Subtracting 10 Using a Number Line Activity, students subtract multiples of ten from multiples of ten on a number line to solve the subtraction equations.

Using Decomposing a Ten Frame Activity, students match addition equation cards with ten frame cards to show equations that make 10.

In this Adding and Subtracting Unknown Numbers Activity, students find the unknown whole number in addition and subtraction equations up to 20.

Using Adding to Make 10 Activity, students match addition equation cards with missing addend cards to show equations that make 10.

Using Missing Number Addition and Subtraction Activity, students fill in the missing addends to complete the addition and subtraction number sentences.

Using Adding and Subtracting on a Number Line Worksheet, studentsuse the number lines to add and subtract the numbers represented by the pictures.

Using Compose and Decompose Numbers 11-19 Activity, students use ten frames to compose and decompose numbers to build numbers sense.

Using Subtraction in the Garden Subtraction Activity, students read and solve subtraction sentences by picking vegetables in the garden!

Using Single Digit Subtraction Activity, students solve single digit subtraction equations to build their subtraction fluency.

Using Subtraction With 6-7-8-9 Differences Activity, students solve single digit subtraction equations, then sort answers into categories.

Using Missing Number Addition Activity, students fill in the missing addends to complete the addition number sentences.

In this Let's Workout Our Brain Add Subtract Within 20 Activity, students fluently add and subtract within 20 using mental strategies.