In this video, we’re going to learn how to count on within 10 to help us find the total number of objects after more objects are added to a group. Let’s imagine we’re on the beach and we can see four crabs. One, two, three, four. Now, what happens if two more crabs joined them? Four and two more make what? We already know that we have a group of four. So we can start by counting from the number four. And we need to count on another two more numbers.
What is two more than four? Let’s use our number track to help us. Start on four and count on two more. Four, five, six. Four and two more make six altogether. We’ve found the answer by counting on. Let’s try answering some questions where we have to count on to find the answer.
How many ducks are there in total? Three ducks and two more ducks is what ducks.
In this question, we’re being asked to add two groups of objects together, some ducks. We need to find how many ducks there are in total when we add these two groups together. In the picture, we can see that we start with three ducks. And then our group of three ducks becomes bigger because we need to add two more ducks. What is two more than three?
We can find the answer by counting on. To start with, we could model our two groups of ducks out of counters, three and then two more. Now, we could just count the counters: one, two, three, and so on. But there’s a quicker way to find the answer, and that’s to count on from the number we know. We know that the first group of ducks contains three ducks. So we can start counting from the number three. Let’s point to this group, say the number three, and then carry on counting. Three, four, five. We started with the number three, and we counted on two more. And we arrived at the number five. Three ducks and two more ducks is five ducks.
How many trees are there in total? Two trees and one more tree.
This is an addition question. We need to add together two groups of trees to find the total. And we’re given a picture sentence to help us here. We start off with a group of two trees. But that’s not all. We need to add another one more tree. Two plus one more is what?
Let’s model our addition using counters. We have a group of two trees, and then we need to add one more. Let’s find the answer by counting on from the number we start with. And our starting number is two because we know there are two trees in the first group. So we’ll say two and then carry on counting one more. Two, three. Two and one is three. So we can say two trees and one more tree gives a total of three trees.
Complete the following sentence. Two boys and three more makes what boys?
In this question, we need to add together two groups of boys. Our first group contains two boys. And we can see in the second picture that our second group contains three more boys. Imagine two boys are having a chat in the playground, and then three more come up and join them. We need to add these two groups together to find the total. Two and three more makes what?
Well, we know that we’re starting with two boys. So we can simply count on three more. And to do this, we could use a number track to help us. So as we’ve said already, we can start counting from the number two because we know there are two boys in the group to start with. Now, we just need to count on three more for the three more boys that arrive. And as we count on, we’ll move our counter. Two, three, four, five. We started at the number two, and we counted on three more numbers. Three, four, five. So we know that two boys and three more makes five boys. The missing number in our sentence is the number five.
How many cats are there in total? Two cats and six cats.
This question asks us to find the number of cats in total. The word “total” means that we need to add our two groups of cats together. In other words, we need to find the answer to two plus another six. When we add together two groups like this, we can find the answer by counting on. We already know that there are two cats in our first group. So we don’t need to count them. We can just say the number two. And so to find the answer, we just need to count on from two another six numbers. Two and six more is what?
Let’s find out. Two, three, four, five, six, seven, eight. We could show the same answer using a number track. Start with the number two and find six more. One, two, three, four, five, six. We’ve reached the number eight. Two plus six more makes eight. So if we have a group of two cats and another group of six cats, we have eight cats in total.
We’ve answered lots of questions in this video. What have we learned? Well, firstly, we’ve learned how to find the total number of objects after more objects are added to a group. And the way that we’ve done this is by counting on.