Find the value of 11+13−42+13−(12)+33−43+12−(12)
Option (b)
Solving the expression using the conventional approach
After a good amount of calculation,
Given expression is equal to 47+117=157
Reverse Gear approach
Approximating, expression 1 = something >12
Similarly, Expression 2= something >32
Question = slightly greater than 12+32=2
Only option (b) satisfies this.