Subtraction

Hello! Imagine you have a big bunch of ten shiny red balloons. Whoosh! A gust of wind carries one away. How many do you have left? You have nine. Or what if you have four yummy cookies, and you eat one for a snack? Now you only have three. That’s me! I’m the one who helps you figure out what’s left over. I show up when you share your toys with a friend, when you spend your allowance money at the store, or when you count how many days are left until your birthday party. Before you even know my name, you can see me everywhere, helping to make big groups a little smaller and showing what remains. I am a question and an answer all at once.

Are you ready to know my name? I am Subtraction! For a very, very long time, people have used me to help them count and keep track of their things. Ancient people didn't have paper and pencils like you do. If a shepherd had ten fluffy sheep and one wandered off to munch on some tasty grass, he needed a way to know. He might have kept ten small pebbles in a pouch. When he counted his sheep at the end of the day and saw only nine, he would take one pebble out of the pouch. That’s how he used me! For thousands of years, people wrote me out with words. But then, on a day in 1557, a smart man from Wales named Robert Recorde decided I needed my very own symbol. In his book, 'The Whetstone of Witte,' he gave me my special, easy-to-draw mark: a little horizontal line, like this –. He called it the minus sign. Now, instead of writing 'five take away two,' you can just write '5 – 2.' It’s so much quicker and neater.

Today, you can find me everywhere you look! I help you figure out the change you get back when you buy an ice cream cone. I help you see how much taller you’ve grown since last year by finding the difference between your heights. I’m not about losing things; I’m about understanding what you have, what you’ve shared, and what has changed. I am a very important helper, and I work closely with my partner, Addition, to solve all kinds of puzzles in the world. So next time you share your crayons with a classmate or count down from ten to blast off your toy rocket, give me a little wave, because I’ll be right there helping you figure it all out.