A teacher has 200 books and wants to put 25 books on each shelf. How many shelves will she need? Also, show how to solve the division problems: a) 320 / 8, b) 400 / 8, c) 240 / 4, and write the invers

$$
320 \div 8 = 40
$$

$$
8 \times 40 = 320
$$
*   **Answer:** $8 \times 40 = 320$

$$
400 \div 8 = 50
$$

$$
8 \times 50 = 400
$$
*   **Answer:** $8 \times 50 = 400$ (Your work $50 \times 9 = 400$ is incorrect, as $50 \times 9 = 450$)

$$
240 \div 4 = 60
$$

$$
4 \times 60 = 240
$$
*   **Answer:** $4 \times 60 = 240$ (Your work is correct)

$$
352 \div 8 = 44 \text{ remainder } 0
$$

$$
8 \times 44 + 0 = 352
$$
*   **Answer:** $8 \times 44 + 0 = 352$ (Your work $8 \times 43 + 8$ is incorrect because the remainder must be less than the divisor. $8 \div 8 = 1$ with remainder 0, so 43 is not the correct quotient.)

$$
448 \div 8 = 56 \text{ remainder } 0
$$

$$
8 \times 56 + 0 = 448
$$
*   **Answer:** $8 \times 56 + 0 = 448$ (