Question

The value of $10.6\times 9.4$ is equal to

• A. 99.36
• B. 99.64
• C. 99.68
• D. 99.32

Answer 1

The correct option is B

99.64

The given expression is

$10.6\times 9.4$

$=(10+0.6)\times (10-0.6)$

$=(10{)}^2-(0.6{)}^2\left[\right(a+b\left)\right(a-b)=a^2-b^2]$

$=100-0.36$

$=99.64$