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.

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

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

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

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

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

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

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.

Using Count Back Activity, students count back from one number to another number to solve the subtraction equations.

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

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

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

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

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

In this Let's Go on a Trip Addition Subtraction Within 100 Activity, students add and subtract within 1000, using concrete models or drawings and strategies.

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 Subtraction BINGO, students play BINGO to solve subtraction problems to 20 and build fact fluency.

Using Subtraction With 2-3-4-5 Differences Activity , students subtract single digit subtraction equations, then sort differences into categories.