45:5+63:7 63:9+24:4 24:3-32:4 96-7•8

Let's break down each of the expressions step-by-step.

1. 45:5 + 63:7

   • 45:5 = 45 ÷ 5 = 9
   • 63:7 = 63 ÷ 7 = 9
   • Therefore, 9 + 9 = 18.

2. 63:9 + 24:4

   • 63:9 = 63 ÷ 9 = 7
   • 24:4 = 24 ÷ 4 = 6
   • Therefore, 7 + 6 = 13.

3. 24:3 - 32:4

   • 24:3 = 24 ÷ 3 = 8
   • 32:4 = 32 ÷ 4 = 8
   • Therefore, 8 - 8 = 0.

4. 96 - 7 • 8

   • First, calculate 7 • 8 = 56.
   • Then, 96 - 56 = 40.

Now, summarizing the results:

1. 45:5 + 63:7 = 18
2. 63:9 + 24:4 = 13
3. 24:3 - 32:4 = 0
4. 96 - 7 • 8 = 40

Final Answers:

1. 18
2. 13
3. 0
4. 40