Class 7 Mathematics Revision Notes
Integers Notes
Integers — Notes Integers are the whole numbers together with their negatives: Properties of operations Closure: addition, subtraction and multiplication of integers always give a…
Fractions and Decimals Notes
Fractions and Decimals — Notes This chapter extends operations on fractions and decimals. Multiplication of fractions A fraction of a number means multiply: of . Fraction fraction…
Data Handling Notes
Data Handling — Notes Data is information collected for a purpose; we organise and represent it. Measures of central tendency Arithmetic mean . The mean lies between the highest a…
Simple Equations Notes
Simple Equations — Notes An equation is a statement that two expressions are equal, containing a variable. Solving an equation An equation stays balanced if we add, subtract, mult…
Lines and Angles Notes
Lines and Angles — Notes Related angles Complementary angles: their measures add up to . Supplementary angles: their measures add up to . Adjacent angles: share a common vertex an…
The Triangle and its Properties Notes
The Triangle and its Properties — Notes Special lines in a triangle A median joins a vertex to the midpoint of the opposite side. An altitude is the perpendicular from a vertex to…
Comparing Quantities Notes
Comparing Quantities — Notes Ratio and percentage A ratio compares quantities of the same kind. A percentage is a fraction with denominator ( ). To convert a fraction or decimal t…
Rational Numbers Notes
Rational Numbers — Notes A rational number can be written as where and are integers and . Positive and negative A rational number is positive if its numerator and denominator have…
Perimeter and Area Notes
Perimeter and Area — Notes Area formulas Parallelogram: . Triangle: . Square: ; Rectangle: . Circles Circumference ; Area , where is the radius and . Conversion of units ; . Key p…
Algebraic Expressions Notes
Algebraic Expressions — Notes Terms, factors and coefficients An expression is formed from variables and constants using operations. A term is a part added or subtracted; its fact…
Exponents and Powers Notes
Exponents and Powers — Notes Exponents give a short way to write repeated multiplication: , where is the base and the exponent . Laws of exponents (same base ) (for ) Standard for…
Symmetry Notes
Symmetry — Notes Line symmetry A figure has line symmetry if a line divides it into two mirror image halves. Regular polygons have as many lines of symmetry as their number of sid…