Relate multiplication and division using visual models of footballs and soccer balls.

Let's solve each problem step by step based on the visual models provided.

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Problem 1: Footballs

We see 3 rows of footballs, and each row has 7 footballs.

So, total number of footballs =
$$
3 \times 7 = 21
$$

Now, write:

- One multiplication sentence
- Two related division sentences

#### ✔ Multiplication:
$$
3 \times 7 = 21
$$

#### ✔ Division (related facts):
- Total divided by number of rows → number per row:
$$
21 \div 3 = 7
$$
- Total divided by number per row → number of rows:
$$
21 \div 7 = 3
$$

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Problem 2: Soccer Balls

We see 4 soccer balls, arranged in a 2×2 grid.

So, there are 2 rows, 2 columns, and total = 4 balls.

We can think of this as:
$$
2 \times 2 = 4
$$

Now, write:

- One multiplication sentence
- Two related division sentences

#### ✔ Multiplication:
$$
2 \times 2 = 4
$$

#### ✔ Division:
- $$
4 \div 2 = 2
$$
- $$
4 \div 2 = 2
$$

(Note: Since both factors are the same, the two division sentences are identical.)

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✔ Final Answers:

#### Problem 1:
- Multiplication: $ 3 \times 7 = 21 $
- Division: $ 21 \div 3 = 7 $
- Division: $ 21 \div 7 = 3 $

#### Problem 2:
- Multiplication: $ 2 \times 2 = 4 $
- Division: $ 4 \div 2 = 2 $
- Division: $ 4 \div 2 = 2 $

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📝 Explanation:

Multiplication and division are inverse operations.
If you have a multiplication fact like $ a \times b = c $, then:
- $ c \div a = b $
- $ c \div b = a $

This relationship helps us understand how grouping and sharing relate to each other.

For example:
- In Problem 1: 3 groups of 7 make 21.
- So, if you divide 21 into 3 groups → 7 each.
- Or divide 21 into groups of 7 → 3 groups.

Similarly for Problem 2: 2 groups of 2 make 4, so dividing 4 by either 2 gives 2.

✔ All answers are consistent with the models shown.