SCERT AP 7th Class Maths Solutions Pdf Chapter 1 Integers Review Exercise Questions and Answers.

## AP State Syllabus 7th Class Maths Solutions 1st Lesson Integers Review Exercise

Question 1.

Represent the following statements with a suitable integer.

(i) Sneha deposited ₹ 2000 in her savings account.

Answer:

+ 2000 Rupees.

(ii) A submarine is in the depth of 350 feet in the sea level.

Answer:

– 350 feet.

(iii) The height of Mount Everest is 8848 m J 3 above the sea level.

Answer:

+ 8848 m.

(iv) Temperature of 14 degrees below 0° C.

Answer:

– 14°C.

Question 2.

Fill the missing integers on the number line.

Answer:

Question 3.

Represent the following additions and subtractions on number line.

(i) 7 + 4

(ii) – 8 + 3

(iii) 9 – 11

(iv) 13 – 5

Answer:

Question 4.

Write the following integers in descending order and ascending order.

(i) -9, -1, 0, -10, -6

Answer:

Ascending order: -10, -9, -6,- 1, 0

Descending order: 0, -1, -6, -9,-10

(ii) -6, 6, -9, 5, 10, -3

Answer:

Ascending order: -9, -6, -3, 5, 6, 10

Descending order: 10, 6, 5, -3, -6, -9

(iii) 15, -20, -35, 0, 2

Answer:

Ascending order: -35, -20, -15, 0, 2

Descending order: 2, 0, -15, -20, -35

Question 5.

Calculate the following.

(i) – 2 + 3

Answer:

– 2 + 3 = +1

(ii) – 6 + (- 2)

Answer:

– 6 + (- 2) = – 6 – 2 = – 8

(iii) 8 – (- 6)

Answer:

8 – (-6) = 8 + 6 = + 14

(iv) – 9 + 4

Answer:

– 9 + 4 = – 5

(v) – 23 – (- 30)

Answer:

– 23 – (- 30) = – 23 + 30 = + 7

(vi) 50 – 153

Answer:

50 – 153 = + 50 – 153 = – 103

(vii) 71 + (- 10) – 8

Answer:

71 + (-10) – 8 = + 71 – 10 – 8

= + 71 – 18 = + 53

(viii) – 30 + 58 – 38

Answer:

-30 + 58 – 38 = – 30 – 38 + 58

= – 68 + 58 = – 10

Question 6.

The temperature in Siachen at 5 a.m. was 10 degrees below 0°C. Six hours later, it had increased to 14°C. What is the temperature at 11 a.m. ?

Answer:

Temperature at 5 a.m. = 10 degrees below 0°C = – 10°C

Six hours later increased temperature = + 14°C

Temperature at 11 a.m. = -10°C + 14°C

= +4°C

∴ Temperature at 11 a.m. in Siachen is + 4°C.

Question 7.

A fish was at 16 feet below the surface of sea and went down another 17 feet. What is its position now from the surface of sea?

Answer:

Place of the fish in the beginning = 16 feet below surface = -16 feet

Place of the fish at last from the beginning = – 17 feet

∴ Position of fish now = – 16 + (-17)

= – 16 – 17

= – 33 feet

Question 8.

A green grocer had a profit of ₹ 250 on Monday, a loss of ₹ 120 on Tuesday and loss of ₹ 180 on Wednesday. Find total profit or loss after 3 days.

Answer:

Profit on Monday = + ₹ 250

Loss on Tuesday = – ₹ 120

Loss on Wednesday = – ₹ 180

Total loss two days = – 120 + (- 180)

= – 120 – 180 = – 300

Loss is greater than profit. So, he will get loss.

∴ Total loss on three days = + 250 + (-300)

= + 250 – 300

= – 50

= – ₹ 50

Question 9.

Fill the empty boxes in first diagram by doing addition of two integers and in second diagram by doing subtraction of two integers.

(i)

Answer:

(ii)

Answer: