## Supporting Lessons

## Addition on the Number Grid: Worksheets and Answers

## How to Subtract Numbers on the Number Grid

**subtract tens**using the number grid, we are moving

**up**the grid.

When we are **subtracting units**, we are moving to the **left**.

In this lesson, we will be looking at subtracting 2-digit numbers using the number grid.

For example:

What is 59 – 24?

We’ll begin by looking at the tens. We have **2** in the **tens column**.

This means that we have 2 lots of 10.

So, we **start at 59** and move **2** places **up** the number grid.

We stop at 39.

Next, we’ll look at the units.

We have **4** in the **units column**. This means that we have 4 lots of 1.

So, we move **4** places to the **left** on the number grid.

We stop at 35.

Therefore,

**59 – 24 =35**.

Here is another example:

What is 76 – 48?

We’ll begin by looking at the tens.

We have **4** in the **tens column**. This means that we have 4 lots of 10.

So, we **start at 76** and move **4** places **up** the number grid.

We stop at 36.

Next, we’ll look at the units.

We have **8** in the **units** column. This means that we have 8 lots of 1.

So, we want to move **8** places to the **left** on the number grid.

After moving 5 places to the left, we stop at 31, which is at the **beginning of the row**.

We can’t move any more places to the left.

So, we move to the **end of the previous row**.

So far, we have moved 6 places. We need to move 2 more places to the left. We stop at 28.

Therefore,

**76 – 48 = 28**.