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D:\Surender Prajapati\Books Final_CBSE and ICSE\ICSE\Preparatory_Stage_Maths-5_(31-10-2023)\Open_Files\CHAP_06
\\November 3, 2023 11:23 AM Surender Prajapati Proof 2 Reader _________________________ Date: ___________________74

Practice Time 6B

1. Choose the correct option.
(a) The sum of (–124) + (+24) is _________.

(i) –100 (ii) 200 (iii) –24 (iv) 100
(b) The difference of (–10) – (–90) is _________.

(i) –80 (ii) –100 (iii) 80 (iv) –84
(c) The predecessor of integer –5 is _________.
(i) 10 (ii) 0 (iii) –6 (iv) 5

2. Find the sum of:
(a) 137 and –354 (b) –52 and 52 (c) –312 and 192

(d) –200 and 300 (e) –29, –31 and –61 (f) 129, –191 and –300

3. Find the difference of the following.
(a) 9 – (–1) (b) (–3) –7 (c) –5 – 8 (d) (–6) – (–7)

4. Represent the following on the number line.
(a) 6 + 4 (b) 7 + (–5) (c) 9 – 5 (d) (–8) – (5)

5. Riya deposits `4500 in his bank account in April 2024. He withdraws `1350 from it
in May 2024. If withdrawal of amount from the account is represented by a negative
integer, then how will you represent the amount deposited? Find the balance in Riya
account after the withdrawal?

6. A plane is flying at the height of 3550 m above sea level. At a particular point, it is
exactly above a submarine floating 1240 m below the sea level. What is the vertical
distance between them.

Encapsulate
math
INTEGERS

Integers Addition and Subtraction of Integers

Š Integers are the set of numbers {...., –4, –3, Addition of Integers:
–2, –1, 0, 1, 2, 3, 4, ....} that consists of the Example: (a) (+26) + (–45) = – (45 – 26) = –19
counting numbers, {1, 2, 3, 4, 5, ....}. (b) (– 11) + (– 12) = – (11 + 12) = – 23

The negative of the counting numbers, {...., –5, Subtraction of Integers:
–4, –3, –2, –1} and zero. Example: (a) –9 from 6 = 6 – (–9) = 6 + 9 = 15
(b) (–2) from (–4) = (–4) – (–2) = (–4) + 2 = –(4 – 2) = – 2
Š Integers can be shown on a number line.

–7 –6 –5 –4 –3 –2 –1 0 1 2 3 4 5 6 7 8
Š An integer is positive if it is greater than zero.
An integer is negative if it is less than zero.

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