We havetriangles and we want to subtracttriangle, which means the same thing as take them away. We can cross off thetriangle that we are subtracting, and count the number that we have left. In this case we havetriangles left. Subtraction is like counting backwards. We can start atand count back.

We havetriangles and we want to subtracttriangle, which means the same thing as take them away. We can cross off thetriangle that we are subtracting, and count the number that we have left. In this case we havetriangles left. Subtraction is like counting backwards. We can start atand count back.

We havetriangles and we want to subtracttriangle, which means the same thing as take them away. We can cross off thetriangle that we are subtracting, and count the number that we have left. In this case we havetriangles left. Subtraction is like counting backwards. We can start atand count back.

We havetriangles and we want to subtracttriangle, which means the same thing as take them away. We can cross off thetriangle that we are subtracting, and count the number that we have left. In this case we havetriangles left. Subtraction is like counting backwards. We can start atand count back.

We havetriangles and we want to subtracttriangle, which means the same thing as take them away. We can cross off thetriangle that we are subtracting, and count the number that we have left. In this case we havetriangles left. Subtraction is like counting backwards. We can start atand count back.

We havetriangles and we want to subtracttriangle, which means the same thing as take them away. We can cross off thetriangle that we are subtracting, and count the number that we have left. In this case we havetriangle left. Subtraction is like counting backwards. We can start atand count back.

We havetriangle and we want to subtracttriangle, which means the same thing as take it away. We can cross off thetriangle that we are subtracting, and count the number that we have left.In this case we have no triangles left. Subtraction is like counting backwards. We can start atand count back.

We havetriangles and we want to subtracttriangle, which means the same thing as take them away. We can cross off thetriangle that we are subtracting, and count the number that we have left. In this case we havetriangles left. Subtraction is like counting backwards. We can start atand count back.

We havetriangles and we want to subtracttriangle, which means the same thing as take them away. We can cross off thetriangle that we are subtracting, and count the number that we have left. In this case we havetriangles left. Subtraction is like counting backwards. We can start atand count back.

We havetriangles and we want to subtracttriangles, which means the same thing as take them away. We can cross off thetriangles that we are subtracting, and count the number that we have left. In this case we havetriangles left. Subtraction is like counting backwards. We can start atand count back.