Advertisement
Question
What is ${(-82) × 7.2 - 32 × (-3.4)}/2.5$?
A
$-192{16/25}$.
B
$-192{12/25}$.
C
$+192{16/25}$.
D
$+192{12/25}$.
Soln.
Ans: a
Ans: a
Observe that all fractional numbers are having one digit to the right of the dot. So we can cancel all the dots and get a plain expression: ${(-82) × 72 - 32 × (-34)}/25$. We can now simpilfy the minus signs to get ${(32 × 34) - (82 × 72)}/25$ which equals ${-4816/25}$, which is same as: $-192{16/25}$