Ysgrifennu rhifau yn y ffurf safonol

3 x 10⁵

• 3000

• 350

• 30,000

• 3,000,000

• 300,000

2 x 10³

• 20,000

• 2000

• 200,000

• 2,000,000

6 x 10⁸ =

• 6,000,000

• 6,000,000,000

• 600,000

• 600,000,000

Business golau (the speed of light) yw 3x10⁸ metr yr eiliad. Beth yw'r pellter bydd golau wedi teithio mewn 2 eiliad felly?

• 600,000 metr

• 600,000,000 metr

• 60,000,000 metr

• 6,800,000

40,000,000 =

• 4 x 10⁸

• 7 x 10⁴

• 4 x 10⁷

• 4 x 10⁶

• 4 x 7¹

370,000 =

• 3.7 x 10⁵

• 37 x 10⁶

• 3.7 x 10⁶

• 37 x 10⁷

• 0.37 x 10⁵

3.09 x 10⁴ =

• 3090

• 39,000

• 30,900

• 309,000

• 390,000

32,000,000 =

• 3.2 x 10⁶

• 3.2 x 10⁷

• 32 x 10⁷

• 3.2 x 10⁵

540,000,000 =

• 5.4 x 10⁸

• 54 x 10⁷

• 5.4 x 10⁹

• 5.4 x 10⁷

20,800 =

• 20.8 x 10⁵

• 2.08 x 10⁵

• 2.8 x 10⁵

• 2.8 x 10³

• 2.08 x 10⁴