Numbers Worksheet-14

Numbers Worksheet-14

1. (+48) + (–53) =

(a) +5                 (b) –5                 (c) 5                    (d) none

2. (+13) – (+12) =

(a) +1                  (b) –1                  (c) 0                    (d) +13

3. (+68) – (–23) =

(a) –91               (b) +91               (c) +23               (d) +19

4. (–62) – (+12) =

(a) +74               (b) –50               (c) –74               (d) –72

5. (–43) – (–12) =

(a) +55               (b) –21               (c) –31                (d) +31

6. Multiplying a negative integer for odd times gives a ____ result.

(a) positive        (b) negative       (c) 0                    (d) none

7. Multiplication of a negative integer for even times gives a ____ result.

(a) negative       (b) 0                    (c) positive        (d) none

8. (–12) × (–3) × (+ 4) × (–6) =

(a) –144             (b) –908            (c) +864            (d) –864

9. (–32) × (–4) × (–3) × 0 × (–6) =

(a) +27,648                                   (b) +276,480

(c) 0                                                (d) –27,648

10. (–6) × (–2) =

(a) –8                 (b) +8                 (c) –12                (d) +12

11. (–12) × (+21) =

(a) –2412           (b) –242            (c) –252             (d) +252

12. If the dividend and divisor have like signs then the quotient will be

(a) positive        (b) negative       (c) Zero              (d) none

13. If the dividend and divisor have un­like signs then the quotient will be

(a) positive        (b) negative       (c) zero               (d) none

14. (+132) divided by (–12)

(a) +101             (b) –101             (c) +11                (d) –11

15. (–144) divided by (+16)

(a) +9                 (b) +11                (c) –9                 (d) +11

16. (–32) divided by ( –4)

(a) +8                 (b) –18               (c) +18               (d) –8

17. Closure property is observed w.r.t. ____operations in integers.

(a) +, ×               (b) +, ÷, ×         (c) +, ×, –                   (d) +, –, ÷

18. The identity element w.r.t. addition in integers is

(a) 1                     (b) –1                  (c) 0                    (d) none

19. The identity element w.r.t. multi­plication in integers is

(a) 1                     (b) –1                  (c) 0                    (d) none

20. Negative of a negative integer is

(a) negative       (b) Zero              (c) positive        (d) none

Answer Key:

(1)-(b); (2)-(a); (3)-(b); (4)-(c); (5)-(c); (6)-(b); (7)-(c); (8)-(d); (9)-(c); (10)-(d); (11)-(c); (12)-(a); (13)-(b); (14)-(d); (15)-(c); (16)-(a); (17)-(c); (18)-(c); (19)-(a); (20)-(c)