# Tag Archives | Addition

## Number and Operations Addition and Subtraction Vol. 1 – This free kindergarten math lesson reviews the fundamental skill of counting forward and backwards. Children act out number stories using objectives and pictures with Henrietta at the Hippo Hotel. The problem solving approach, real life context and immediate feedback will make addition and subtraction fun and relatable for your young children.

## Number and Operations Addition Two Digits plus One-Digit Level 1 Vol. 1 – Children practice adding a 2-digit number plus a 1-digit number with Reba Rabbit in this free, first grade number and operations lesson. First, kids estimate the sum and then use a number line and virtual manipulatives to develop mental addition strategies and solve addition problems.

## Number and Operations Addition, Adding Three or More Numbers Level 2 Vol. 1 – The strength of this free number and operations lesson is that it uses concrete models to help students develop number sense and mental math in a trial and error, problem-solving approach, including problems with multiple right answers. Children join Kirima and the penguins to the ice carnival and add, compose and decompose three or more numbers with on the way.

## Number and Operations Problem Solving, Addition and Subtraction with Decimals Level 4 Vol. 1 – In this free number and operation lesson, your children will help Omar check his receipts and solve addition and subtraction problems with decimals. Students first, estimate if the receipt total is correct or incorrect using mental math. If the receipt has errors, they may use a calculator to make the corrections.  This is a not only a foundational skill, but also a fun way to practice mental math and real-world calculations. 