Datrys 7*10^-5+89*10^-9-3*10^-5=

$$7 \times 10 ^ { - 5 } + 89 \times 10 ^ { - 9 } - 3 \times 10 ^ { - 5 } =$$

Enrhifo

$$\frac{40089}{1000000000}=0.000040089$$

Camau Ateb

Cyfrifo 10 i bŵer -5 a chael \frac{1}{100000}.

$$7\times \frac{1}{100000}+89\times 10^{-9}-3\times 10^{-5}$$

Lluosi 7 a \frac{1}{100000} i gael \frac{7}{100000}.

$$\frac{7}{100000}+89\times 10^{-9}-3\times 10^{-5}$$

Cyfrifo 10 i bŵer -9 a chael \frac{1}{1000000000}.

$$\frac{7}{100000}+89\times \frac{1}{1000000000}-3\times 10^{-5}$$

Lluosi 89 a \frac{1}{1000000000} i gael \frac{89}{1000000000}.

$$\frac{7}{100000}+\frac{89}{1000000000}-3\times 10^{-5}$$

Adio \frac{7}{100000} a \frac{89}{1000000000} i gael \frac{70089}{1000000000}.

$$\frac{70089}{1000000000}-3\times 10^{-5}$$

Cyfrifo 10 i bŵer -5 a chael \frac{1}{100000}.

$$\frac{70089}{1000000000}-3\times \frac{1}{100000}$$

Lluosi 3 a \frac{1}{100000} i gael \frac{3}{100000}.

$$\frac{70089}{1000000000}-\frac{3}{100000}$$

Tynnu \frac{3}{100000} o \frac{70089}{1000000000} i gael \frac{40089}{1000000000}.

$$\frac{40089}{1000000000}$$

Ffactor

$$\frac{3 \cdot 7 \cdot 23 \cdot 83}{2 ^ {9} \cdot 5 ^ {9}} = 4.0089 \times 10^{-5}$$