–30 + (-30) – 30

(a)  

–8 (-8)

(a)  

29 + (-21) – (+7)

(a)  

-10 + 16

(a)  

– 16 x (-20)

(a)  

12 + (-4)

(a)  

(-46) + (-14)

(a)  

(-42) + 42

(a)  

-18 + (-14)

(a)