Tough and Tricky questions: Decimals.
The value of x is derived by summing a, b, and c and then rounding the result to the tenths place. The value of y is derived by first rounding a, b, and c to the tenths place and then summing the resulting values. If a = 5.45, b = 2.95, and c = 3.74, what is y – x?
Choose one:
A) -0.1
B) 0
C) 0.05
D) 0.2
E) 0.3
To find x, we first sum a, b, and c, then round to the tenths place. 5.45 + 2.95 + 3.74 = 12.14, which rounds to 12.2.   To find y, we first round a, b, and c to the tenths place and them sum them. so 5.4 + 2.9 + 3.7 = 12.0.   We are looking for y - x, which gives us  12.2 - 12.0= 
<gadget id="calculator"> 12.2 - 12.0</gadget>
<output>0.2</output>
0.2, or answer choice 0.2.
<result>D</result>
Tough and Tricky questions: Decimals.
The value of x is derived by summing a, b, and c and then rounding the result to the tenths place. The value of y is derived by first rounding a, b, and c to the tenths place and then summing the resulting values. If a = 5.45, b = 2.95, and c = 3.74, what is y – x?