Answer:

1. 15 x 5 = 75

5x5 = 25

5x1 = 1

5+2=7

=75

2. (-25) x (-4) = 100

when both negative make it positive

3. (5) x (-35) = -175

when different signs change the sign to the sign that the bigger number has

4.(-9) x (6) = -54  

5. 12 x 4 = 48

6. 35 ÷ 5 = 7

7. (-20) ÷ (-4) = 5

8. (15) ÷ (-3) = -5

9. (-69) ÷ 3 = -23

10. (-48) ÷ (12​) = -4