Numbers Worksheet-8

Numbers Worksheet-8

(–12) × (+21) =

(a) –2412 (b) –242 (c) –252 (d) +252

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

(a) Positive (b) Negative (c) Zero (d) None

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

(a) Positive (b) Negative (c) Zero (d) None

(+132) ÷ (–12)

(a) +101 (b) –101 (c) +11 (d) –11

(–144) ÷ (+16)

(a) +9 (b) +11 (c) –9 (d) +11

(–32) ÷ (–4)

(a) +8 (b) –18 (c) +18 (d) –8

Closure property is observed w.r.t. _____ operations in integers.

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

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

(a) 1 (b) –1 (c) 0 (d) none

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

(a) 1 (b) –1 (c) 0 (d) none

Negative of a negative integer is

(a) Negative (b) Zero (c) Positive (d) None

Positive of a negative integer is

(a) Negative (b) Positive (c) Zero (d) None

Value of 124 × 4 – 3 + 118 ÷ 2

(a) 552 (b) 496 (c) 553 (d) –553

Value of 1.8 + 3.4 ÷ 0.2 – 0.6 × 0.3

(a) 3.50 (b) –3.32 (c) 3.32 (d) 18.62

While removing brackets the order in which the brackets are removed is

(a) [ ], ( ), { } (b) { }, ( ), [ ] (c) ( ), { }, [ ] (d) None

If negative sign precedes a bracket the sight of the terms inside the bracket will ______ when the bracket is removed.

(a) not change (b) Change

If positive sign precedes a bracket the sign of the terms inside the bracket will _____ when the bracket is removed.

(a) not change (b) Change (c) be 0 (d) None

7 – [13 – {–2 –6(6 of 5)}]

(a) –172 (b) +180 (c) +172 (d) 0

(a) (b) (c) 3 (d) –3

18 of [59 – {7 × 8 + (26 – 3 of 5)}]

(a) –188 (b) +144 (c) –144 (d) none

6 – [2 – {3 + (4 – 8)}]

(a) –3 (b) +3 (c) 0 (d) 1

Answer Key:

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