A simple tool to make integer operations more concrete. This manipulative makes adding positive and negative numbers more intuitive. Integers come up in so many places, from middle school all the way through high school with solving equations. This tool h
Love this explanation for positive and negative numbers. Positive numbers add a ballon, negative numbers add ballast. If you take away ballast (minus negative) the ballon goes up. If you add ballast (add a negative) you go down.
Ultimate Guide to Hands-On Math for 2nd, 3rd, and 4th Grade
Adding & subtracting positive and negative numbers on a number line. (Free printable number line and 'walking man' available on her page! Worked for my whole class, lowies used manipulatives, uppers moved on quick.