51 - 4 =

(a)  

70 x 30 =

(a)  

800 + 700 =

(a)  

78 + 60 =

(a)  

(a)  

$$\frac{1}{5}\ \ o\ 30\ =$$

(a)  

805 x 10 =

(a)  

Beth ydy'r 100 agosaf i 324?

What is the nearest 100 to 324?

(a)  

$$\frac{1}{3}\ o\ 18\ =$$

(a)