Showing posts with label class7-maths. Show all posts
Showing posts with label class7-maths. Show all posts

Tuesday, 26 November 2019

CBSE Class 7 Maths - Chapter 9 - Rational Numbers (Worksheet)(#class7Maths)(#eduvictors)

Chapter 9 - Rational Numbers (Worksheet)

CBSE Class 7 Maths
CBSE Class 7 Maths - Chapter 9 - Rational Numbers (Worksheet)(#class7Maths)(#eduvictors)

Fill in the blanks

1. A rational number is a number that can be written in the form p/q, where p and q are ________ and q ____ 0.


2. The ________ of a rational number can never be zero.


3. The rational number _______ is neither negative nor positive.


Tuesday, 30 July 2019

CBSE Class 7 Maths - Lines and Angles - Worksheet -2 (#eduvictors)(#cbsenotes)

Lines and Angles (Worksheet -2)
CBSE Class 7 Maths 

CBSE Class 7 Maths - Lines and Angles - Worksheet -2 (#eduvictors)(#cbsenotes)

Fill in the blanks


1. A/An _________ is formed when lines or line segments meet.


2. The lines that form an angle are called the _______ or the _______ of the angle. 


3. The common end point is called the _________ of the angle. 


4. The angle formed by two lines or line segments can be a/an _______ angle, where the measure of the angle is less than 90°.

Thursday, 2 May 2019

Class 7 - Maths - Properties of Integers (#cbsenotes)(#eduvictors)(#class7maths)

Class 7 - Mathematics - Properties of Integers 

Class 7 - Maths - Properties of Integers (#cbsenotes)(#eduvictors)(#class7maths)

1. Closure Property Under Addition

Integers are closed under addition, i.e. for any two integers,a and b, a+b is an integer. 
eg: 3 + 4 = 7
   -9 + 7 = 2


2. Closure Property under Subtraction: 

Integers are closed under subtraction, i.e. for any two integers,a and b, a-b is an integer.
eg:
-21 -(-9) = -12
8  -3    = 5

3. Closure Property under Multiplication: 

Integers are closed under multiplication, i.e. for any two integers,a and b, ab is an integer.
e.g.
5 × 6 = 30
-3 × -8 = 24
-3 × 7 = -21

Sunday, 28 April 2019

CBSE Class 7 - Maths - Chapter 1 - Integers and Operations On Integers (#cbsenotes)(#eduvictors)

Integers and Operations On Integers 

Class 7 - Mathematics

CBSE Class 7 - Maths - Chapter 1 - Integers and Operations On Integers (#cbsenotes)(#eduvictors)


1. When two positive integers are added, we get a positive integer.
     e.g. 6 + 4 = 10

2. When two negative integers are added, we get a negative integer.
     e.g.  -6 + (-3) = -9

3. When a positive and a negative integer are added, the sign of the sum is always the sign of the bigger number of the two, without considering their signs.
     e.g.  45 + -25 = 20   and    -45 + 20 = -25

4. Additive Inverse
The additive inverse of any integer a is - a, and the additive inverse of (- a) is a.
e.g.  Additive inverse of (-15) = - (-15) = 15

Sunday, 28 October 2018

CBSE Class – VII - Mathematics - Chapter 6 – Simple Linear Equations - ASSIGNMENT (#cbenotes)(#eduvictors)

Chapter 6 – Simple Linear Equations ASSIGNMENT

CBSE Class – VII - Mathematics - Chapter 6 – Simple Linear Equations - ASSIGNMENT (#cbenotes)(#eduvictors)

POINTS TO REMEMBER

1. Equation: An equation is a statement which states that two expressions are equal.

2. To solve an equation means to find the value of the variable (unknown quantity) used in it.

Note: An equation remains unchanged if
(i) the same number is added to each side of the equation. .
(ii) the same number is subtracted from each side of the equation.
(iii) the same number is multiplied to each side of the equation.
(iv) Each side of the equation is divided by the same non-zero number.
(v) In transposing any term of an equation from one side to another, then its sign is reversed is
(a) from positive to negative and from negative to positive
(b) from multiplication to division and from division to multiplication.

3. In equation :
It is a statement of inequality between two expressions involving a single variable with the highest power one.

4. Replacement set
For a given inequation, the set from which the values of its variable are taken is called the replacement set or domain of the variable.

Monday, 1 October 2018

CBSE Class 8 - Mathematics - Chapter 1 - Integers (Key Points) (#cbsenotes)(#eduvictors)

Mathematics - Chapter 1 - Integers
(Key Points)

CBSE Class 8 - Mathematics - Chapter 1 - Integers (Key Points) (#cbsenotes)(#eduvictors)

Integers are a bigger collection of numbers which is formed by whole numbers and their negatives.

You have studied in the earlier class,  about the representation of integers on the number line and their addition and subtraction.

We now study the properties satisfied by addition and subtraction.
(a) Integers are closed for addition and subtraction both. That is, a + b and a – b are again integers, where a and b are any integers.

(b) Addition is commutative for integers, i.e., a + b = b + a for all integers a and b.

(c) Addition is associative for integers, i.e., (a + b) + c = a + (b + c) for all integers a, b and c.

(d) Integer 0 is the identity under addition. That is, a + 0 = 0 + a = a  for every integer a.

We studied, how integers could be multiplied and found that product of a  positive and a negative integer is a negative integer, whereas the product of two negative integers is a positive integer. For example, – 2 × 7 = – 14 and – 3 × – 8 = 24.

Product of even number of negative integers is positive, whereas the product of an odd number of negative integers is negative.

Wednesday, 19 September 2018

Class 7 - Mathematics - Chapter - Algebraic Expressions (Very Short Questions and Answers) (#cbsenotes)(#eduvictors)

Algebraic Expressions 

(Short Questions and Answers)
Class 7 - Mathematics 

Class 7 - Mathematics - Chapter - Algebraic Expressions (Very Short Questions and Answers) (#cbsenotes)(#eduvictors)

Worksheet


Fill in the blanks
Q1: An algebraic expression containing three terms is called a __________.

Q2: Factors of -5x²y²z are : _____________________________________.

Q3: Sum or difference of two like terms is a ______________.

Q4: -5a²b and -5b²a are ________________ terms.

Q5: In the expression 2πr, the algebraic variable is ___________ and 2π is ________.

Saturday, 8 September 2018

Class 7 - Maths - Lines and Angles (Worksheet) (#cbsenotes)(#eduvictors)

Lines and Angles (Worksheet)

Class 7 - Maths - Lines and Angles (Worksheet) (#cbsenotes)(#eduvictors)

Directions: Fill in the blanks to make the statements true.


1. If sum of measures of two angles is 90°, then the angles are _________.

3. If the sum of measures of two angles is 180°, then they are _________.

3. A transversal intersects two or more than two lines at _________ points.


Friday, 24 August 2018

Divisibility Rules of Various Numbers - CBSE Class 6-12 - NTSE, Entrance Tests - Mathematics Tips (#cbsenotes)(#entrancetests)(#eduvictors)

Divisibility Rules of Various Numbers 

(2-25)
Divisibility Rules of Various Numbers  - CBSE Class 6-12 - NTSE, Entrance Tests - Mathematics Tips (#cbsenotes)(#entrancetests)(#eduvictors)

Divisibility by 2: 
A number is divisible by 2 if its unit’s digit is even or 0.

Divisibility by 3: 
A number is divisible by 3 if the sum of its digits are divisible by 3.

Divisibility by 4: 
A number is divisible by 4 if the last 2 digits are divisible by 4, or if the last two digits are 0’s.

Divisibility by 5: 
A number is divisible by 5 if its unit’s digit is 5 or 0.

Divisibility by 6: 
A number is divisible by 6 if it is simultaneously divisible by 2 and 3.

Wednesday, 11 July 2018

CBSE Class 7 - Maths - Exponents and Powers (MCQs) (#cbsenotes)(#eduvictors)

Exponents and Powers
(MCQs)

CBSE Class 7 - Maths - Exponents and Powers (MCQs) (#cbsenotes)(#eduvictors)

Q1: Simplify 2³

(a) 6
(b) 8
(c) 10
(d) 222

Q2: What is the value of 3⁰?

(a) 0
(b) 1
(c) 3
(d) Not Defined

Q3: Value of 12² is _____

(a) 2
(b) 24
(c) 144
(d) 0

Tuesday, 7 November 2017

CBSE Class 7 - Mathematics - Fractions and Decimals NCERT Exercise 2.6 (#eduvictors) (#cbsenotes) (#ncertanswers)

Mathematics - Fractions and Decimals - NCERT Exercise 2.6

CBSE Class 7 - Mathematics - Fractions and Decimals NCERT Exercise 2.6 (#eduvictors) (#cbsenotes) (#ncertanswers)

Question 1: Find:
(i) 0.2 ✕ 6 (ii) 8 ✕ 4.6 (iii) 2.71 ✕ 5
(iv) 20.1 ✕ 43 (v) 0.05 ✕ 7 (vi) 211.02 ✕ 4
(vii) 2 ✕ 0.86


Answer:
(i) 0.2 ✕ 6 = 1.2
(ii) 8 ✕ 4.6 = 36.8
(iii) 2.71 ✕ 5 = 13.55
(iv) 20.1 ✕ 4 = 80.4
(v) 0.05 ✕ 7 = 0.35
(vi) 211.02 ✕ 4 = 844.08
(vii) 2 ✕ 0.86 = 1.72


Thursday, 19 October 2017

CBSE Class 7 - Mathematics - Chapter – 12 - Algebraic Expressions - NCERT Solution 12.1 (#NCERTAnswers)

Chapter – 12 - Algebraic Expressions
NCERT Exercise 12.1

CBSE Class 7 - Mathematics - Chapter – 12 - Algebraic Expressions - NCERT Solution 12.1 (#NCERTAnswers)

Question 1: Get the algebraic expressions in the following cases using variables, constants and arithmetic operations:

(i) Subtraction of z from y .
(ii) One-half of the sum of numbers x and y .
(iii) The number z multiplied by itself.
(iv) One-fourth of the product of numbers p and q .
(v) Numbers x and y both squared and added.
(vi) Number 5 added to three times the product of m and n .
(vii) Product of numbers y and z subtracted from 10.
(viii) Sum of numbers a and b subtracted from their product.


Answer:
(i) y - z

(ii)
(x+y)
-----
 2

(iii)  z²

(iv)  pq
     ----
       4

(v)   x² + y²

(vi) 3mn + 5

(vii) 10 - yz

(viii) ab - ( a + b )


Friday, 8 September 2017

CBSE Class 7 - Maths - Chapter 2 - Decimals - Multiplication and Division (Worksheet) (#cbseNotes)

Chapter 2 - Decimals - Multiplication and Division (Worksheet)

CBSE Class 7 - Maths - Chapter 2 - Decimals - Multiplication and Division (Worksheet) (#cbseNotes)


Multiplying Decimals

Q1. Multiply the decimals.
4.4 ✕ 4.6
9.06 ✕ 54
4.23 ✕ 2.41
8.13 ✕ 3.6

Q2. Solve:
____ ✕ 53.99 = 539.9
87.13 ✕ ____ = 87130
10 ✕ _____ = 913
_____ ✕ 1000 = 85300
88.233 ✕ 100 = _____

Q3. Convert to fractions and multiply.
87.0 ✕ 5.2
34.10 ✕ 70.20


Monday, 4 September 2017

CBSE Class 7 - Maths - Algebraic Expressions - Practice Sheet (#cbseNotes)

Class 7 - Maths - Algebraic Expressions
- Practice Sheet

CBSE Class 7 - Maths - Algebraic Expressions - Practice Sheet (#cbseNotes)


Q1. Classify as monomial, binomial and trinomial.

(a) x - x² + x³
(b) -26ab
(c) -7p²q -7pq²
(d) -27a² -125b²
(e) 2978



Q2. Form algebraic expressions from the following statements.

(a) Sum of the terms 5x and (-9y)
(b) Sum of the squares of 4 and x
(c) Product of a and b added to the sum of y and 20.
(d) Two times number 9 is subtracted from the product of y and z.



Tuesday, 23 May 2017

CBSE Class 7 Maths - Data Handling - NCERT EXERCISE 3.4 (#cbsenotes)

Data Handling

EXERCISE 3.4
CBSE Class 7 Maths
CBSE Class 7 Maths - Data Handling - NCERT EXERCISE 3.4 (#cbsenotes)


Q1: Tell whether the following is certain to happen, impossible can happen but not certain.
(i) You are older today than yesterday.
(ii) A tossed coin will land heads up.
(iii) A die when tossed shall land up with 8 on top.
(iv) The next traffic light seen will be green.
(v) Tomorrow will be a cloudy day.

Answer:
(i) It is certain to happen.
(ii) It can happen but not certain.
(iii)It is impossible.
(iv) It can happen but not certain.
(v)  It can happen but not certain.


Sunday, 7 May 2017

CBSE Class 7 Maths - Integers - NCERT Exercise 1.3 (#cbsenotes)

Integers

EXERCISE 1.3
CBSE Class 7 Maths
CBSE Class 7 Maths - Integers - NCERT Exercise 1.3 (#cbsenotes)



Q1: Find each of the following products:
(a) 3 × (–1)
(b) (–1) × 225
(c) (–21) × (–30)
(d) (–316) × (–1)
(e) (–15) × 0 × (–18)
(f) (–12) × (–11) × (10)
(g) 9 × (–3) × (– 6)
(h) (–18) × (–5) × (– 4)
(i) (–1) × (–2) × (–3) × 4
(j) (–3) × (–6) × (–2) × (–1)


Answer:
(a) 3 × (–1) = = –3

(b) (–1) × 225 = -225

(c) (–21) × (–30) = 630

(d) (–316) × (–1) = 316

(e) (–15) × 0 × (–18) = 0

(f) (–12) × (–11) × (10) = 132 × 10 = 1320

(g) 9 × (–3) × (– 6) = 9 × 18 = 162

(h) (–18) × (–5) × (– 4) = 90 × (–4) = –360

(i) (–1) × (–2) × (–3) × 4 = –6 × 4 = -24

(j) (–3) × (–6) × (–2) × (–1) = 18 × 2 = 36


Thursday, 4 May 2017

CBSE Class 7 Maths - Integers - NCERT Exercise 1.2 (#cbsenotes)

Integers

EXERCISE 1.2
CBSE Class 7 Maths

CBSE Class 7 Maths - Integers - NCERT Exercise 1.2 (#cbsenotes)

Q1: 1. Write down a pair of integers whose:
(a) sum is –7
(b) difference is –10
(c) sum is 0

Answer:
(a) One such pair whose sum is -7 = -4 + (-3) = -7
(b) One such pair whose difference is -10 = -3 - 7 = 10
(c) One such pair whose sum is 0 = -5 + 5 = 0