evaluate: ab-(a-b) if a=0.5 and b=0.4
a b - ( a - b ) =
0.5 * 0.4 - ( 0.5 - 0.4 ) =
0.2 - 0.1 = 0.1
they are correct :)
To evaluate the expression ab-(a-b) when a=0.5 and b=0.4, you need to substitute the given values of a and b into the expression, and then perform the required calculation.
Here's how you do it step-by-step:
Step 1: Substitute the values of a and b into the expression.
ab - (a - b)
= (0.5)(0.4) - (0.5 - 0.4)
Step 2: Simplify the expression inside the brackets.
= (0.2) - (0.1)
Step 3: Perform the subtraction.
= 0.2 - 0.1
= 0.1
Therefore, when a=0.5 and b=0.4, the value of the expression ab-(a-b) is 0.1.