Final answer:
To approximate 56 to the tenths place, it remains as is, because it is already at that precision. Since there is no number in the hundredths place to consider for rounding, the number 56 stays 56.0. The correct choice is B. 56.0.
Step-by-step explanation:
To approximate 56 to the tenths place means to adjust the number 56 to the nearest tenth. Given that the number 56 falls exactly on a whole number, the approximation doesn't change the figure in the tenths place when we look at options A, B, C, and D.
Since the number 56 has a 0 in the tenths place (56.0), no rounding is needed, and thus the correct answer is B. 56.0. When performing rounding or approximating exercises in mathematics, we always look to the digit immediately to the right of the place value we are rounding to.
In this case, since we are approximating to the tenths place, there isn't any digit on the right of the tenths place, implying that 56.0 is already at the tenths precision. Therefore, 56 stays as 56.0 when approximated to the nearest tenth, often depicted in mathematics when ensuring consistent decimal places among a series of numbers.