We have \(\displaystyle 6\) triangles and we want to subtract \(\displaystyle 0\) triangles, which means the same thing as take them away. \(\displaystyle 0\) means that we don't want to take anything away, so we will be left with what we started with. In this case we have \(\displaystyle 6\) triangles left since we started with \(\displaystyle 6\) triangles. 

We have \(\displaystyle 7\) triangles and we want to subtract \(\displaystyle 0\) triangles, which means the same thing as take them away. \(\displaystyle 0\) means that we don't want to take anything away, so we will be left with what we started with. In this case we have \(\displaystyle 7\) triangles left since we started with \(\displaystyle 7\) triangles. 

We have \(\displaystyle 8\) triangles and we want to subtract \(\displaystyle 0\) triangles, which means the same thing as take them away. \(\displaystyle 0\) means that we don't want to take anything away, so we will be left with what we started with. In this case we have \(\displaystyle 8\) triangles left since we started with \(\displaystyle 8\) triangles. 

We have \(\displaystyle 9\) triangles and we want to subtract \(\displaystyle 0\) triangles, which means the same thing as take them away. \(\displaystyle 0\) means that we don't want to take anything away, so we will be left with what we started with. In this case we have \(\displaystyle 9\) triangles left since we started with \(\displaystyle 9\) triangles. 

We have \(\displaystyle 10\) triangles and we want to subtract \(\displaystyle 0\) triangles, which means the same thing as take them away. \(\displaystyle 0\) means that we don't want to take anything away, so we will be left with what we started with. In this case we have \(\displaystyle 10\) triangles left since we started with \(\displaystyle 10\) triangles. 

We have \(\displaystyle 7\) triangles and we want to subtract \(\displaystyle 5\) triangles, which means the same thing as take them away. We can cross off the \(\displaystyle 5\) triangles that we are subtracting, and count the number that we have left. In this case we have \(\displaystyle 2\) triangles left. Subtraction is like counting backwards. We can start at \(\displaystyle 7\) and count back \(\displaystyle 5\).

\(\displaystyle 7,6,5,4,3,2\)

We have \(\displaystyle 8\) triangles and we want to subtract \(\displaystyle 5\) triangles, which means the same thing as take them away. We can cross off the \(\displaystyle 5\) triangles that we are subtracting, and count the number that we have left. In this case we have \(\displaystyle 3\) triangles left. Subtraction is like counting backwards. We can start at \(\displaystyle 8\) and count back \(\displaystyle 5\).

\(\displaystyle 8,7,6,5,4,3\)

We have \(\displaystyle 9\) triangles and we want to subtract \(\displaystyle 6\) triangles, which means the same thing as take them away. We can cross off the \(\displaystyle 6\) triangles that we are subtracting, and count the number that we have left. In this case we have \(\displaystyle 3\) triangles left. Subtraction is like counting backwards. We can start at \(\displaystyle 9\) and count back \(\displaystyle 6\).

\(\displaystyle 9,8,7,6,5,4,3\)

We have \(\displaystyle 9\) triangles and we want to subtract \(\displaystyle 7\) triangles, which means the same thing as take them away. We can cross off the \(\displaystyle 7\) triangles that we are subtracting, and count the number that we have left. In this case we have \(\displaystyle 2\) triangles left. Subtraction is like counting backwards. We can start at \(\displaystyle 9\) and count back \(\displaystyle 7\).

\(\displaystyle 9,8,7,6,5,4,3,2\)

We have \(\displaystyle 8\) triangles and we want to subtract \(\displaystyle 7\) triangles, which means the same thing as take them away. We can cross off the \(\displaystyle 7\) triangles that we are subtracting, and count the number that we have left. In this case we have \(\displaystyle 1\) triangle left. Subtraction is like counting backwards. We can start at \(\displaystyle 8\) and count back \(\displaystyle 7\).

\(\displaystyle 8,7,6,5,4,3,2,1\)