7th Standard

Chapter 1 : Integers

Introduction to integers

Integers = Whole Numbers & Negative Numbers
Integers can be understood easily by representing them on the numberline

Integers

Properties of adding & subtracting integers

• Closure under Addition
• x = Integer
• Y=Integer
• x + y = Integer
• Example : 
• 2+(-1) = 1
• (-2)+1 = -1
• 2+1=3
• (-2)+(-1) = -3
• 
  
• Closure under subtraction
• Associative
• Commutative

Identity of integers

• Multiplicative identity = 1
• Additive identity = 0

Easy to integers

Chapter 2 : Fractions & Decimals

Types of fractions

• Proper Fraction
• Improper Fraction
• Mixed Fraction

Proper Fraction = Numerator is smaller than Denominator. Eg : 2/3

Improper Fraction = Numerator is greater than Denominator. Eg : 3/2