JAMB 1989 · UME · Q2

Evaluate $2{,}700{,}000 \times 0.03 \div 18{,}000$ .

Worked solution (try it first)

Multiply first: $2\,700\,000 \times 0.03$ is 3 hundredths of 2 700 000, which is $81\,000$ .
Divide: $81\,000 \div 18\,000 = 81 \div 18 = 4.5$ .
In standard form $4.5 = 4.5 \times 10^0$ , option A.