Exercise 6.3

1.Find

(a) 35 – (20) =

(b) 72 – (90) =

(c) (– 15) – (– 18) =

(d) (–20) – (13) =

(e) 23 – (– 12) =

(f) (–32) – (– 40) =

2. Fill in the blanks with >, < or = sign.

(a) (– 3) + (– 6) <>= (– 3) – (– 6)

(b) (– 21) – (– 10) ><= (– 31) + (– 11)

(c) 45 – (– 11) ><= 57 + (– 4)

(d) (– 25) – (– 42) >=< (– 42) – (– 25)

3. Fill in the blanks.

(a) (– 8) + = 0

(b) 13 + = 0

(c) 12 + (– 12) =

(d) (– 4) + = – 12

(e) – 15 = – 10

4. Find

(a) (– 7) – 8 – (– 25) =

(b) (– 13) + 32 – 8 – 1 =

(c) (– 7) + (– 8) + (– 90) =

(d) 50 – (– 40) – (– 2) =