簡約 999.9999800000000…(6.9*10^{-3})

解

簡約

999.9999800000000 \dots (6.9 \cdot 1 0^{- 3})

6.89999 \dots

解答ステップ

999.99998 (6.9 \cdot 1 0^{- 3})

1 0^{- 3} = \frac{1}{1000}

= 999.99998 \cdot 6.9 \cdot \frac{1}{1000}

6.9 \cdot \frac{1}{1000} = \frac{6.9}{1000}

= 999.99998 \cdot \frac{6.9}{1000}

数を割る:

\frac{6.9}{1000} = 0.0069

= 999.99998 \cdot 0.0069

数を乗じる:

999.99998 \cdot 0.0069 = 6.89999 \dots

= 6.89999 \dots