7.NS.A.1: Add integers with zero pairs: a dot and a ring make zero, then undo it

Apply and extend previous understandings of addition and subtraction to add and subtract integers and other rational numbers; represent addition and subtraction on a horizontal or vertical number line diagram.Common Core State Standards for Mathematics, as adopted in the Massachusetts Curriculum Framework for Mathematics (2017), Grade 7.

Play the game: Below Zerofree, no sign-up →

How ColorMyMath teaches it

The number line keeps going: below zero, between the whole numbers, and far past 100. Every position is a place you can land on and see.

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.

More Grade 7 standards in The Number System

• 7.NS.A.2Long division turns a fraction into a decimal that ends or repeats
• 7.NS.A.3Real problems with all four operations and negative numbers

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.