Exercise 4.2 (Inequality)

Exercise 4.2

1. Say whether true or false.

i. (23 + 4) = (4+23) True

ii. (9+4) > 12 True

iii. ( 9+ 4) < 12 False

iv. 121 > 121 False

v. 142 < 142 False

vi. 112 = 112 True

vii. (6 × 5) = (32−2) True

viii. 49/7 >7 False

ix. ( 4 × 3) = (3 × 4) True

x. (21+0) = 21 True

2. Fill in the blanks with the right symbol (<, > or =).

i) (54 ÷ 9) [__] ( 8 − 3 )

ii) (6 + 2) [__] (4 × 2)

iii) (10 × 2) [__] (15 + 20)

Answer:

i) (54 ÷ 9) [ > ] ( 8 − 3 )

ii) (6 + 2) [ = ] (4 × 2)

iii) (10 × 2) [ < ] (15 + 20)

 3. Fill in the blanks in the expressions with the suitable number.

i. (1 × 9) = ( 9 ×1)

ii. (6 × 3) > (8 × 2)

iii. (36 ÷ 6) < (9 × 7)

iv. (0 + 2) > (7 × 0)

v. (42 ÷ 7) = (4+2)

vi. (6 – 4) < (1+2)

Answer:

Exercise 4.2

1. (i) True (ii) True (iii) False (iv) False (v) False (vi) True (vii) True (viii) False (ix) True (x) True

2. (i) > (ii) = (iii) <

3. (i) 9 (ii) 2 (iii) 1 (iv) 0 (v) 2 (vi) 4