Round to four significant figures in scientific notation

Scientific Notation and Rounding

Round each of the following numbers to four significant figures,

and express the result in scientific notation:

a. 300.235800

b. 456,500

c. 0.006543210

d. 0.000957830

e. –0.035000

[참고] 유효 숫자. significant figure

[참고] 과학적 표기법. scientific notation

a. 300.235800

> 300.2

> 3.002×10^2

b. 456,500

> 456,500

> 4.565×10^5

c. 0.006543210

> 0.006543

> 6.543×10^(-3)

d. 0.000957830

> 0.0009578

> 9.578×10^(-4)

e. –0.035000

> –0.03500

> –3.500×10^(-2)

[키워드] 유효숫자 기준, 과학적 표기법 기준