two-colored counters equation 10 for dinner number lines sum Monster Musical Chairs dice symbol A Mountain of Trash playing cards equal sign The Crayon Counting Book hundred chart equal Get up and Go OA.3 addend Ready, Set, Hop! OA.4 subtrahend Lights, Out! bear counters minuend One is a Snail Ten is a Crab Ten Sly Piranhas Ten Little Fish Counting Crocodiles Five Little Monkeys Elevator Magic Domino Addition One More Bunny Roll Over! Let’s Go Visiting First Grade Unit 4: Operations and Algebraic Thinking―Addition and Subtraction Topic 3: Add and Subtract Within 20 Big Ideas/Enduring Understandings: Understand connections between counting and addition and subtraction (e.g., adding two is the same as counting on two). Use properties of addition to add whole numbers and to create and use increasingly sophisticated strategies based on these properties (e.g., ―making tens) to solve addition and subtraction problems within 20. Essential Questions: What strategies can you use to solve addition and subtraction facts within 20? How can the relationship between addition and subtraction help you find the solution to related facts? Content Standards Content standards are interwoven and should be addressed throughout the year in as many different units and activities as possible in order to emphasize the natural connections that exist among mathematical topics. Add and subtract within 20
two-colored counters number lines dice playing cards hundred chart OA.3 OA.4 bear counters equation sum symbol equal sign equal addend subtrahend minuend 10 for dinner Monster Musical Chairs A Mountain of Trash The Crayon Counting Book Get up and Go Ready, Set, Hop! Lights, Out! One is a Snail Ten is a Crab Ten Sly Piranhas Ten Little Fish Counting Crocodiles Five Little Monkeys Elevator Magic Domino Addition One More Bunny Roll Over! Let’s Go Visiting First Grade Unit 4: Operations and Algebraic Thinking―Addition and Subtraction Topic 3: Add and Subtract Within 20 Big Ideas/Enduring Understandings: Understand connections between counting and addition and subtraction (e.g., adding two is the same as counting on two). Use properties of addition to add whole numbers and to create and use increasingly sophisticated strategies based on these properties (e.g., ―making tens) to solve addition and subtraction problems within 20. Essential Questions: What strategies can you use to solve addition and subtraction facts within 20? How can the relationship between addition and subtraction help you find the solution to related facts? Content Standards Content standards are interwoven and should be addressed throughout the year in as many different units and activities as possible in order to emphasize the natural connections that exist among mathematical topics. Add and subtract within 20