The 2-digit number chosen to multiply by 75 is 62.

Multiply by 3: 3 × 62 = 186

Add two zeros: 18600

Divide by 4 (or by 2 twice): 18600/2 = 9300, 9300/2
= 4650

So 75 × 62 = 4650.

See the pattern?

The 3-digit number chosen to multiply by 75 is 136.

Multiply by 3: 3 × 136 = 390 + 18 = 408

Add two zeros: 40800

Divide by 4 (or by 2 twice): 40800/2 = 20400, 20400/2
= 10200

So 75 × 136 = 10200.

Practice and you will be able to give these products quickly. Multiply from left
to right for simpler mental math, and divide by 2 twice if division by 4 is not easy