1 1.OA.C.6 Grade 1 · Operations and Algebraic Thinking

1.OA.C.6: Add and subtract within 20: counting on, making ten, breaking down to a ten, doubles; fluent within 10

Add and subtract within 20, demonstrating fluency for addition and subtraction within 10.Common Core State Standards for Mathematics, as adopted in the Massachusetts Curriculum Framework for Mathematics (2017), Grade 1.

Play the game: Making 10Step 7 of the ColorMyMath curriculum · free, no sign-up →
Steps 10, 30 · Doubles →Steps 15, 18 · Crash the Dots →Steps 32, 33 · Which Way? →Steps 34–38 · Jump Down →Steps 39–43 · Climb →Step 44 · Proving →Step 45 · Proving →Step 46 · Proving →Step 47 · Proving →Step 48 · Proving →Easy Addition →

How ColorMyMath teaches it

Addition is a length — dots laid end to end on the number line. Taking away comes down the same line. Every fact is shown as a picture before it is ever asked for from memory.

Every page is free and open — nothing to install, no account, and it works on a phone or a classroom board. Every number has its own color: 1 red, 2 orange, 3 yellow, 4 green, 5 blue, 6 purple, 7 brown, 8 pink, 9 cyan, and a number is that many colored dots.

Where it sits in the curriculum

More Grade 1 standards in Operations and Algebraic Thinking

← 1.OA.C.51.OA.D.7 →

ColorMyMath · getridoftheteacher.com · every number has its own color, and a number is that many colored dots. Matching a game to a standard is a judgement call; the official text is at doe.mass.edu.