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I'll solve this multiplication number bonds problem step by step.

First, I need to understand what a "multiplication number bond" is. Looking at the image, I can see that each problem has a top circle with a product (the result of multiplication) and two bottom circles representing the factors that multiply to give that product. One factor is given, and I need to find the missing factor.

Let me start by examining the first row to understand the pattern:

1. Top: -45, Bottom left: -5, Bottom right: ?
Since -5 × ? = -45, then ? = -45 ÷ -5 = 9

2. Top: -24, Bottom left: ? , Bottom right: -8
Since ? × -8 = -24, then ? = -24 ÷ -8 = 3

3. Top: -60, Bottom left: -10, Bottom right: ?
Since -10 × ? = -60, then ? = -60 ÷ -10 = 6

4. Top: -54, Bottom left: -6, Bottom right: ?
Since -6 × ? = -54, then ? = -54 ÷ -6 = 9

I can see the pattern now. For each problem, I need to divide the top number (product) by the given bottom number (one factor) to find the missing factor.

Let me continue solving all the problems in the same manner:

Row 2:
5. 32 ÷ 8 = 4
6. -21 ÷ -3 = 7
7. 27 ÷ 3 = 9
8. -72 ÷ 6 = -12

Row 3:
9. -54 ÷ -9 = 6
10. -25 ÷ -5 = 5
11. 40 ÷ -4 = -10
12. -40 ÷ -8 = 5

Row 4:
13. 18 ÷ -3 = -6
14. 16 ÷ -4 = -4
15. 20 ÷ 4 = 5
16. -40 ÷ 8 = -5

Row 5:
17. -12 ÷ -3 = 4
18. 15 ÷ 5 = 3
19. 30 ÷ 6 = 5
20. -36 ÷ -9 = 4

The solution is to fill in each missing number by dividing the top number by the given bottom number, following the rules of integer division (positive ÷ positive = positive, negative ÷ negative = positive, positive ÷ negative = negative, negative ÷ positive = negative).