Solve (4*10^-3)-(2*10^-4)

$$(4 \times { 10 }^{ -3 } )-(2 \times { 10 }^{ -4 } )$$

Evaluate

$$\frac{19}{5000}=0.0038$$

Solution Steps

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

$$4\times \frac{1}{1000}-2\times 10^{-4}$$

Multiply 4 and \frac{1}{1000} to get \frac{1}{250}.

$$\frac{1}{250}-2\times 10^{-4}$$

Calculate 10 to the power of -4 and get \frac{1}{10000}.

$$\frac{1}{250}-2\times \frac{1}{10000}$$

Multiply 2 and \frac{1}{10000} to get \frac{1}{5000}.

$$\frac{1}{250}-\frac{1}{5000}$$

Subtract \frac{1}{5000} from \frac{1}{250} to get \frac{19}{5000}.

$$\frac{19}{5000}$$

Factor

$$\frac{19}{2 ^ {3} \cdot 5 ^ {4}} = 0.0038$$