![]() ![]() We hope today's mathematical Wonder of the Day was the inverse of boring! Be sure to explore the following activities with a friend or family member: It’s always difficult to learn a new skill, but when you can connect it to something you already know, it gets easier! ![]() Thinking about it like this can help you get a better grasp on subtraction. If you need to visualize it, just think of the addition number fact in reverse, switching the place of the equal sign and the plus sign and then switching the plus sign to a minus sign. The related subtraction number facts also follow, since they’re the opposite of the two addition number facts. If 1 + 2 = 3, then it obviously follows that 2 + 1 = 3, since you’re just switching around the order of the two numbers you’re adding. If we stick with 1, 2, and 3 as our three numbers, we can create the following fact family: We call these four number facts a fact family, since they’re related kind of like the members of a family. For example, 1 + 2 = 3 is a number fact.įor each set of three different numbers, you can create two addition and two subtraction number facts that are related. A number fact is a simple equation made up of three different numbers. To understand the relationship between addition and subtraction on an even deeper level, we need to learn about two more things: number facts and fact families. If we then take away 1 from our 2, we undo the addition we just performed and end up with 1. And guess what? The inverse of subtraction is addition! Why? Addition and subtraction are opposites. Likewise, the inverse of addition is subtraction. So what does inverse mean? Without getting too technical, you can think of inverse as meaning “opposite.”įor example, the inverse of hot is cold. ![]() After all, it’s completely different from addition, right? Not so fast! Addition and subtraction actually share a special relationship.Īs mathematicians like to say, there is an inverse relationship between addition and subtraction. Kids often feel that subtraction is more difficult. Instead, you’re taking things away and trying to figure out how many are left. You’re no longer counting up two groups of things to get a simple sum. Then one day, your teacher turns the tables on you. Easy peasy, right? Sure, it gets harder, but before long you’re memorizing all of those basic addition facts with the help of flash cards. When you’re first learning basic math, it can seem as easy as 1 + 1 = 2. A big thank you goes to Deb Frazier’s class in Ohio for nominating today’s Wonder! ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |