lesson 1- integers 01-04-2020
GOOD MORNING TO ALL
Sources : Youtube
Students will be able to
Feel free to pause, do the problem yourself, replay for better
understanding
Integers - Lesson 1
INTEGERS
Textbook to be followed : NCERT
Sources : Youtube
A few guidelines to go through the blog.
- the text in blue is to be written in your copy.
- the text in violet is to viewed by clicking on it.
Students will be able to- Recognize and recall integers and their representation on the number line
- Extend their knowledge of addition and subtraction of integers to word problems
- Extend their knowledge of addition and subtraction of integers to word problems
Introduction ( Prerequisite Knowledge)
Natural numbers are all numbers 1, 2, 3, 4… They are the numbers you usually count and they will continue on into infinity. Whole numbers are all natural numbers including 0 e.g. 0, 1,2 ….. Integers include all whole numbers and their negative counterparts
Explanation
Draw the following
Representation of integers on a number line
Positive numbers always lie on the right side of zero
, negative numbers always lie on the left side of zero, and
arrowheads on both ends of the line are meant to suggest
that the line continues indefinitely in the positive and
negative directions.
Positive numbers always lie on the right side of zero
, negative numbers always lie on the left side of zero, and
arrowheads on both ends of the line are meant to suggest
that the line continues indefinitely in the positive and
negative directions.
Students this should enable you to do NCERT Ex 1.1 – 1
NCERT Ex 1.1
Question 3. At Srinagar temperature was –5∘C on Monday and then it dropped by 2∘C on Tuesday. What was the temperature of Srinagar on Tuesday? On Wednesday, it rose by 4∘C. What was the temperature on this day?
Answer:
On Monday, temperature at Srinagar = –5°C
On Tuesday, temperature dropped = 2°C
∴Temperature on Tuesday = –5°C – 2°C = –7°C
On Wednesday, temperature rose up = 4°C
∴Temperature on Wednesday = –7°C + 4°C = –3°CThus, temperature on Tuesday and Wednesday was –7°C and –3°Crespectively.
Now for better understanding of how to solve the word
problems click on the following link.
problems click on the following link.
Feel free to pause, do the problem yourself, replay for better
understanding
This should enable you to do NCERT Ex 1.1 – Q 2,4,5,6
Home Assignments
Ex. 1.1- Q 1,3,4 and 6
TRY THESE - Pg 2 and 3
TRY THESE - Pg 2 and 3
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