Question

Chapter 1 – Integers

1. –16 ÷ [8 ÷ (–2)] is equal to _________.

2. Write a pair of integers whose sum is zero (0) but difference is 10.

3. Write two integers which are smaller than –3, but their difference is greater than –3.

4. Write a pair of integers whose product is –36 and whose difference is 15.

5. You are at an elevation 380 m above sea level as you start a motor ride. During the ride, your elevation changes by the following metres: 540 m, –268 m, 116 m, –152 m, 490 m, –844 m, 94 m. What is your elevation relative to the sea level at the end of the ride?

6. Evaluate the following, using distributive property. (i) –39 × 99
(ii) (–85) × 43 + 43 × (–15) (iii) 53 × (–9) – (–109) × 53 (iv) 68 × (–17) + (–68) × 3

7. Height of a place A is 1800 m above sea level. Another place B is 700 m below sea level. What is the difference between the levels of these two places?

8. In a test, +3 marks are given for every correct answer and –1 mark are given for every incorrect answer. Sona attempted all the questions and scored +20 marks though she got 10 correct answers.

(i) How many incorrect answers has she attempted?
(ii) How many questions were given in the test?

9. Taking today as zero on the number line, if the day before yesterday is 17 January, what is the date 5 days after tomorrow ?

10. The temperature of a certain place fell by 2◦C (a change of -2◦C) each day for a week. What is the change of temperature over the whole week?

Answer 1

Answer:

1. -4

Step-by-step explanation:

-16÷(-4)

-4

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Answer 2

Answer:

1. -4

Hope it helps you keep smiling :)