Selina solutions concise mathematics class 6 icse Solutions for Chapter 6 negative numbers and integers

If 3 > -2, then 3 is on the ………….. side of -2 on the number line.

Negative of 8 is ………..

If -8 < -6, then -8 is on the …………. side of -6 on the number line.

A decrease in temperature from 15 ℃ to 10 ℃ can be represented as ______.

If going south is negative then going north is …………

Use appropriate sign.

Since 5 < 7, therefore -5 ……….. -7.

If 10 represents a gain of ₹ 10, then -10 represents a ………….. of ₹ 10 .

Q1)Fill in the blanks :

(i) Negative of -20 is ……….

(ii) Negative of 0 is …………

(iii) Negative of 8 is ………..

(iv) If 10 represents gain of ₹ 10, then -10 represents …………..

(v) If going south is negative then going north is …………

(vi) Because 5 < 7, therefore -5 ……….. -7.

(vii) If 3 > -2, then 3 is on the ………….. of -2.

(viii) If -8 < -6, then -8 is on the …………. of-6.

The difference in temperature 30 ℃ to 55 ℃ can be represented as ______.

Which of the following statements are correct?

Statement I: Decrease in cost by Rs. 10 is expressed as 10

Statement II: Increase in cost by Rs. 10 is expressed as -10

Newton saw an apple fall from a height of 8 m on the ground. What is the current position of the apple from the ground level?

Ramanujan throws a pebble into a river of depth 50 m from a hill of height 10 m. What is the current position of the pebble from the ground if it has reached the bottom of the river?

Negative of -20 is ……….

Negative of 0 is …………

Q2)Use a number line to write the following integers in ascending (increasing) order :

(i) -5, 8, 0, -9, 4, -14 and 12

(ii) -6, 7, 0, -9, 5 and 9

The following number line shows integers -5, 8, 0, -9, 4, -14 and 12 in ascending (increasing) order.

Is it true or false?

The following number line integers -6, 7, 0, -9, 5 and 9 in ascending order.

The following number line shows integers -4, 3, -8, -12, -7 and 6 in descending order.

Q3)Use a number line to write the following integers in descending (decreasing) order :

(i) -10, 0, 3, -4, 12, 11, -1 and 5

(ii) -4, 3, -8, -12, -7 and 6.

The following number line shows the integers -10, 0, 3, -4, 12, 11, -1 and 5 in descending (decreasing) order.

13 + 15 = ____ .

Q4)Add:

(i) 13 and 15

(ii) -13 and 15

(iii) 13 and -15

(iv) -13 and -15

-13 + 15 = ___ .

(-13) +(-15) = ___

13 +(-15) = ____ .

Add:

257 and -254

Add:

258 and -473

Add:

-623 and 326

Q5)Add:

(i) 259 and 214

(ii) -528 and -243

(iii) -623 and 326

(iv) 258 and -473

(v) -622 and -254

(vi) 257 and -254

Add:

-622 and -254

Add:

-528 and -243

Add:

259 and 214

Subtract :

-8 from -2

Subtract:

-6 from -3

Subtract :

5 from 8

Subtract :

4 from -7

Subtract :

-5 from 8

Subtract:

-3 from 12

Q6)Subtract :

(i) 5 from 8

(ii) -5 from 8

(iii) 4 from -7

(iv) -8 from -2

(v) -3 from 12

(vi) -6 from -3

Q7)Subtract:

(i) -123 from 453

(ii) -78 from -12

(iii) 329 from -124

(iv) -222 from 0

Subtract:

-78 from -12

Subtract:

-123 from 453

Subtract:

329 from -124

Subtract:

-222 from 0

What will be 5 less than 2 using a number line?

What will be 7 less than -8 using a number line?

What will be 5 more than -9 using a number line?

What will be 7 more than 0 using a number line?

What will be 3 more than -1 using number line?

What will be 4 less than -4 using a number line?

Q8)Using a number line, find the integer which is :

(i) 3 more than -1

(ii) 5 less than 2

(iii) 5 more than -9

(iv) 4 less than -4

(v) 7 more than 0

(vi) 7 less than -8