Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.1
Apply properties of operations as strategies to add and subtract.2 Examples: If 8 + 3 = 11 is known, then 3 + 8 = 11 is also known. (Commutative property of addition.) To add 2 + 6 + 4, the second two numbers can be added to make a ten, so 2 + 6 + 4 = 2 + 10 = 12. (Associative property of addition.)
Understand subtraction as an unknown-addend problem. For example, subtract 10 – 8 by finding the number that makes 10 when added to 8.
Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = _ – 3, 6 + 6 = _.
What is the sum of 12 + 12? In this movie, you’ll learn that a doubles fact is a number sentence where two of the same numbers are added together. A doubles fact has the same addend. Find out how memorizing your doubles can help you add and subtract much faster. Discover how to solve math problems in more than one way, and how you can use addition or subtraction to find the sum. You’ll also learn how you can use number triangles to help you solve problems and how to solve doubles-plus-one and doubles-minus one facts.
In this lesson plan which is adaptable for grades 1-5, students use BrainPOP resources (including a free online interactive game) to practice combining numbers to create target amounts. Students will apply a variety of mental math strategies as they add during online game play, as well as in a hands-on addition game they create with a partner. This lesson plan is aligned to Common Core State Standards. See more »
In this lesson plan which is adaptable for grades 1-5, students will use an online math game to practice creating number combinations (such as whole numbers which add up to 10, or decimals which add up to 1.) Students then create their own version of the game using hands-on materials. This lesson plan is aligned to Common Core State Standards. See more »
In this lesson plan which is adaptable for grades 2-5, students will use BrainPOP Jr. and BrainPOP resources (including an online math game) to practice multiplying whole numbers and/or decimals. Students will identify patterns within a multiplication table and create their own multiplication tables with unique patterns. This lesson plan is aligned to Common Core State Standards. See more »
In this multi-day lesson plan for grade K through 3, students use a BrainPOP Jr. movie, graphic organizer, and flip chart to deepen their understanding of basic addition and mathematical thinking skills. This lesson plan is aligned to Common Core State Standards. See more »
This page contains information to support educators and families in teaching K-3 students about addition and doubles facts. The information is designed to complement the BrainPOP Jr. movie Doubles. It explains the type of content covered in the movie, provides ideas for how teachers and parents can develop related understandings, and suggests how other BrainPOP Jr. resources can be used to scaffold and extend student learning. See more »
In this set of activities adaptable for grades K-3, parents and educators will find ideas for teaching about addition and doubles facts. These activities are designed to complement the BrainPOP Jr. Doubles topic page, which includes a movie, quizzes, online games, printable activities, and more. See more »