中等MATH-NUMB-010
Which of the following is 0.000456 written in scientific notation?
A. 4.56 × 10^(−4)✓ 答案
B. 4.56 × 10^(−3)
C. 45.6 × 10^(−5)
D. 4.56 × 10^4
解說
Move the decimal point four places to get a coefficient between 1 and 10, giving 4.56 × 10^(−4). 45.6 × 10^(−5) has the same value but the coefficient is not in the required range.