Maths Formulas For Class 7

Mathematics is so important in our life. Because we use the mathematical equation in our daily life activities. Every student should have a clear understanding of the Maths formulas and their applications.

Refer the class 7 maths formulas to solve complex problems. Some topics involved in class 7 Mathematics are as follows:

  • Number System
  • Integers
  • Fractions
  • Decimals
  • Mensuration
  • Algebra
  • Ratio and Proportion

Class 7 Maths Formulas

Proportion Formula Rules:
Addition: [latex]\frac{a}{b}+\frac{c}{d}=\frac{ad+bc}{bd}[/latex]
Subtraction: [latex]\frac{a}{b}-\frac{c}{d}=\frac{ad-bc}{bd}[/latex]
Multiplication:[latex]\frac{a}{b}=\frac{c}{d}[/latex], then ad = bc
Division : [latex]\frac{\frac{a}{b}}{\frac{c}{d}}=\frac{ad}{bc}[/latex]
Set properties:
Commutative property: [latex]A\cup B=B\cup A \\ A\cap B=B\cap A[/latex]
Associative property:[latex](A\cup B)\cup C=A\cup (B\cup C)\\ (A\cap B)\cap C=A\cap (B\cap C)[/latex]
Algebraic Expression Expansion:
[latex](a+b)^{2}=a^{2}+2ab+b^{2}[/latex]
[latex](a-b)^{2}=a^{2}-2ab+b^{2}[/latex]
[latex]a^{2}-b^{2}=(a+b)(a-b)[/latex]
[latex](x+a)(x+b)=x^{2}+x(a+b)+(ab)[/latex]
Consumer Math Formulas:
Simple Interest, [latex]S.I=\frac{PTR}{100}[/latex],

Where P=Principal, T= Time in years,R=Rate of interest per annum

[latex] Rate,R=\frac{100 \times S.I}{P \times T}[/latex]
[latex]Principal,P=\frac{100 \times S.I}{R \times T}[/latex]
[latex]Time,T=\frac{100 \times S.I}{R \times P}[/latex]
Discount = MP-SP
Principal = Amount – Simple Interest
If Rate of Discount is given, [latex]Discount=\frac{Past\; Rate\; of\; Discount}{100}[/latex]
Time and Speed:
[latex]Speed=\frac{Distance\; travelled}{Time\; taken}[/latex]
[latex]Number\; of\; Revolution=\frac{Distance\; travelled}{Circumference\; of\; the\; wheel}[/latex]
Area Formulas for 2D and 3D Figures:
Area of Circle = π rSq units, where r is the radius

Area of Rectangle = l x b Sq.units, where l = length and b is breadth

Total Surface Area for Cube = 6a2 sq.units

Total surface Area of cuboid = 2(lb+bh+hl) Sq.units

Perimeter Formulas
Square = 4s units, where s is side of square

Rectangle= 2(l+b) units, where l is length and b is breadth

Volume Formulas:
Volume of Cube = a3 cu.units

Volume of Sphere=4/3 π r3 cu.units, where r is the radius of the sphere.

Volume of Cylinder= π r2h cu.units, where r is the radius of the base, h is the height of the cylinder.

Related Articles:

Basic Mathematics Formula Addition Formula
Basics of Algebra Arithmetic Geometry

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Quiz on Maths formulas for class 7

3 Comments

  1. Maths formula

  2. I am student of Kendra vidalaya

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