Whakaoti i te 4*10^-3-2*10^-4

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

Aromātai

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

Ngā Upane Otinga

Tātaihia te 10 mā te pū o -3, kia riro ko \frac{1}{1000}.

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

Whakareatia te 4 ki te \frac{1}{1000}, ka \frac{1}{250}.

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

Tātaihia te 10 mā te pū o -4, kia riro ko \frac{1}{10000}.

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

Whakareatia te 2 ki te \frac{1}{10000}, ka \frac{1}{5000}.

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

Tangohia te \frac{1}{5000} i te \frac{1}{250}, ka \frac{19}{5000}.

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

Tauwehe

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