NCERT Solutions Class 7 Maths Chapter 1 Exercise 1.1 Integers Questions 1

Question

Cuemath · Accepted Answer

a) Let us observe the number line given in the question, we can determine the temperature of the cities as follows,
The temperature at the Lahulspiti is equal to -8°C
The temperature at the Srinagar is equal to -2°C
The temperature at Shimla is equal to 5°C
The temperature at the Ooty is equal to 14°C
The temperature at Bengaluru is equal to 22°C
b) The difference between the temperature of the two cities can be calculated as:
22°C - (- 8°C) = 22°C + 8°C
= 30°C
Remember that for subtraction, we add the additive inverse of the integer subtracted to the other integer.
The additive inverse of 8 is -8 and therefore, we added 22 and 8 to get the answer.
c) Temperature of Srinagar: -2°C
Temperature of Lahulspiti: -8°C
Although the absolute value of the temperature of Lahulspiti is higher than that of Srinagar, it is a negative integer and thus, it is lower.
Therefore, the difference between the temperature is:
-2° C - (-8° C) = - 2° C + 8° C
= 8° C - 2° C
= 6° C
d) Temperature of Srinagar & Shimla together
= - 2° C + 5° C
=3° C
So, we can say that the temperature of Srinagar and Shimla, taken together is less than the temperature of Shimla.
3° C < 5° C
But the temperature of Srinagar and Shimla taken together is not less than the temperature of Srinagar.
-2°C < 3°C

Cuemath · Answer

a) Let us observe the number line given in the question, we can determine the temperature of the cities as follows,
The temperature at the Lahulspiti is equal to -8°C
The temperature at the Srinagar is equal to -2°C
The temperature at Shimla is equal to 5°C
The temperature at the Ooty is equal to 14°C
The temperature at Bengaluru is equal to 22°C
b) The difference between the temperature of the two cities can be calculated as:
22°C - (- 8°C) = 22°C + 8°C
= 30°C
Remember that for subtraction, we add the additive inverse of the integer subtracted to the other integer.
The additive inverse of 8 is -8 and therefore, we added 22 and 8 to get the answer.
c) Temperature of Srinagar: -2°C
Temperature of Lahulspiti: -8°C
Although the absolute value of the temperature of Lahulspiti is higher than that of Srinagar, it is a negative integer and thus, it is lower.
Therefore, the difference between the temperature is:
-2° C - (-8° C) = - 2° C + 8° C
= 8° C - 2° C
= 6° C
d) Temperature of Srinagar & Shimla together
= - 2° C + 5° C
=3° C
So, we can say that the temperature of Srinagar and Shimla, taken together is less than the temperature of Shimla.
3° C < 5° C
But the temperature of Srinagar and Shimla taken together is not less than the temperature of Srinagar.
-2°C < 3°C

NCERT Solutions Class 7 Maths Chapter 1 Exercise 1.1 Integers

☛ Download NCERT Solutions Class 7 Maths Chapter 1 Exercise 1.1

More Exercises in Class 7 Maths Chapter 1

NCERT Solutions Class 7 Maths Chapter 1 Exercise 1.1 Tips

NCERT Solutions for Class 7 Maths Video Chapter 1 Exercise 1.1