Datrys (7*10^-6)(7*10^-6)=49*10^-13

$$(7 \times { 10 }^{ -6 } )(7 \times { 10 }^{ -6 } )=49 \times { 10 }^{ -13 }$$

Gwireddu

Camau Ateb

Er mwyn lluosi pwerau sy’n rhannu’r un sail, adiwch eu esbonyddion. Adiwch -6 a -6 i gael -12.

$$7\times 10^{-12}\times 7=49\times 10^{-13}$$

Cyfrifo 10 i bŵer -12 a chael \frac{1}{1000000000000}.

$$7\times \frac{1}{1000000000000}\times 7=49\times 10^{-13}$$

Lluosi 7 a \frac{1}{1000000000000} i gael \frac{7}{1000000000000}.

$$\frac{7}{1000000000000}\times 7=49\times 10^{-13}$$

Lluosi \frac{7}{1000000000000} a 7 i gael \frac{49}{1000000000000}.

$$\frac{49}{1000000000000}=49\times 10^{-13}$$

Cyfrifo 10 i bŵer -13 a chael \frac{1}{10000000000000}.

$$\frac{49}{1000000000000}=49\times \frac{1}{10000000000000}$$

Lluosi 49 a \frac{1}{10000000000000} i gael \frac{49}{10000000000000}.

$$\frac{49}{1000000000000}=\frac{49}{10000000000000}$$

Lluosrif lleiaf cyffredin 1000000000000 a 10000000000000 yw 10000000000000. Troswch \frac{49}{1000000000000} a \frac{49}{10000000000000} yn ffracsiynau gyda’r enwadur 10000000000000.

$$\frac{490}{10000000000000}=\frac{49}{10000000000000}$$

Cymharu \frac{490}{10000000000000} gyda \frac{49}{10000000000000}.

$$\text{false}$$