The Subtraction Symbol
In this video, we will learn how to read, write, and model subtraction sentences with numbers up to 10 and represent subtraction using the minus sign. This is the subtraction symbol. We use it to say subtract, take away, or minus.
Here are three ladybugs munching on a leaf. If one of the ladybugs flies away, there will be two left. We could use counters to help us model this subtraction problem. We can use three counters because there are three ladybugs to begin with. We need to take one of the counters away because one of the ladybugs flew away. And there are two counters left. Three take away one is two. Let’s practice subtracting.
What is four subtract one?
We’re shown a picture of four light bulbs. One of the light bulbs is not working. So, we have to take it away. We need to work out what four take away one is. Let’s use counters to help us model this subtraction problem. Here we have four counters to represent the four light bulbs. And we need to take one away. How many counters are left? There are three left. Four take away one is three.
Find the answer to eight subtract three.
We’re shown a picture of eight pieces of candy. And we have to take away three. We could use eight bricks to represent our eight pieces of candy. If we take away three of our bricks, how many do we have left? Let’s count them. One, two, three, four, five. Eight take away three is five. The answer is five.
What will we get if we take away three from nine?
We’re shown a ten frame with nine counters. We have to take away three of them. One, two, three. How many counters are left in the ten frame? There are six counters left. We had nine counters. We took away three. We got six. If we take away three from nine, we will get six. Nine subtract three is six.
What have we learned in this video? We’ve learned how to read, write, and model subtraction sentences using the subtraction symbol.