Solve 6.43*10^-5-0.25*10^-3=

$$6.43 \times 10 ^ { - 5 } - 0.25 \times 10 ^ { - 3 } =$$

Evaluate

$$-0.0001857$$

Solution Steps

Calculate 10 to the power of -5 and get \frac{1}{100000}.

$$6.43\times \frac{1}{100000}-0.25\times 10^{-3}$$

Multiply 6.43 and \frac{1}{100000} to get \frac{643}{10000000}.

$$\frac{643}{10000000}-0.25\times 10^{-3}$$

Calculate 10 to the power of -3 and get \frac{1}{1000}.

$$\frac{643}{10000000}-0.25\times \frac{1}{1000}$$

Multiply 0.25 and \frac{1}{1000} to get \frac{1}{4000}.

$$\frac{643}{10000000}-\frac{1}{4000}$$

Subtract \frac{1}{4000} from \frac{643}{10000000} to get -\frac{1857}{10000000}.

$$-\frac{1857}{10000000}$$

Factor

$$-0.0001857$$