Worksheet for practicing addition using arrays, with examples and blank equations for students to complete.

Let's solve each array step by step and write the addition equations as requested.

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Array 1:

This is a 3×3 grid (3 rows, 3 columns), so there are 9 squares.

- Equation 1: Add the number of squares in each row →
$ 3 + 3 + 3 = 9 $

- Equation 2: Add the number of squares in each column →
$ 3 + 3 + 3 = 9 $

✔ So:
```
3 + 3 + 3 = 9
3 + 3 + 3 = 9
```

---

Array 2:

This is a 2×5 grid (2 rows, 5 columns), so there are 10 squares.

- Equation 1: Add the number of squares in each row →
$ 5 + 5 = 10 $

- Equation 2: Add the number of squares in each column →
$ 2 + 2 + 2 + 2 + 2 = 10 $

✔ So:
```
5 + 5 = 10
2 + 2 + 2 + 2 + 2 = 10
```

---

Array 3:

This is a 3×2 grid (3 rows, 2 columns), so there are 6 squares.

- Equation 1: Add the number of squares in each row →
$ 2 + 2 + 2 = 6 $

- Equation 2: Add the number of squares in each column →
$ 3 + 3 = 6 $

✔ So:
```
2 + 2 + 2 = 6
3 + 3 = 6
```

---

Array 4:

This is a 2×6 grid (2 rows, 6 columns), so there are 12 squares.

- Equation 1: Add the number of squares in each row →
$ 6 + 6 = 12 $

- Equation 2: Add the number of squares in each column →
$ 2 + 2 + 2 + 2 + 2 + 2 = 12 $

✔ So:
```
6 + 6 = 12
2 + 2 + 2 + 2 + 2 + 2 = 12
```

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✔ Final Answers:

1.
$ 3 + 3 + 3 = 9 $
$ 3 + 3 + 3 = 9 $

2.
$ 5 + 5 = 10 $
$ 2 + 2 + 2 + 2 + 2 = 10 $

3.
$ 2 + 2 + 2 = 6 $
$ 3 + 3 = 6 $

4.
$ 6 + 6 = 12 $
$ 2 + 2 + 2 + 2 + 2 + 2 = 12 $

---

📝 Explanation:

- Each array represents a rectangle made up of unit squares.
- We can count the total number of squares by adding the number of squares in each row or each column.
- The two equations show different ways to add the same total using repeated addition (which leads into multiplication concepts).
- This helps students understand how arrays relate to addition and later to multiplication.

Let me know if you'd like this turned into a printable answer sheet!