Step-by-step explanation:

we can solve the following using tricks ,without long calculation ..

a) 75^2 =

5×5= 25

7 ×8= 56

answer = 5625

b) 78 × 11

= 858

c) 45^2 =

5^2 = 25

4×5 = 20

answer = 2025

d) 89 × 22

= 1958

hope this helps u...