# Developmental Maths Part 1

#### Learn basic maths using examples from the Monterey Institute. Created by Khan Academy.

###### Average Course Length

12 hours

###### Skill Level

Beginner

##### Pick a lesson

1: Place Value 1

2: Place Value 2

3: Place Value 3

4: Rounding Whole Numbers 1

5: Rounding Whole Numbers 2

6: Rounding Whole Numbers 3

7: Comparing Whole Numbers 1

8: Comparing Whole Numbers 2

9: Comparing Whole Numbers 3

10: Adding Whole Numbers and Applications 1

11: Adding Whole Numbers and Applications 2

12: Adding Whole Numbers and Applications 3

13: Adding Whole Numbers and Applications 4

14: Subtracting Whole Numbers

15: Subtraction with Borrowing or Regrouping

16: Subtraction Word Problem

17: Rounding to Estimate Differences

18: Rounding to Estimate Sums

19: Rounding to Estimate Sums 2

20: Multiplying Whole Numbers and Applications 1

21: Multiplying Whole Numbers and Applications 2

22: Multiplying Whole Numbers and Applications 3

23: Multiplying Whole Numbers and Applications 4

24: Multiplying Whole Numbers and Applications 5

25: Multiplying Whole Numbers and Applications 6

26: Dividing Whole Numbers and Applications 1

27: Dividing Whole Numbers and Applications 2

28: Dividing Whole Numbers and Applications 3

29: Dividing Whole Numbers and Applications 4

30: Dividing Whole Numbers and Applications 5

31: Dividing Whole Numbers and Applications 6

32: Properties of Whole Numbers

33: Identity Property of 1

34: Commutative Law of Addition

35: Commutative Law of Multiplication

36: Associative Law of Addition

37: Associative Law of Multiplication

38: The Distributive Property

39: The Distributive Property 2

40: Understanding Exponents

41: Understanding Exponents 2

42: Understanding Square Roots

43: Order of Operations

44: Order of Operations 2

45: Numerator and Denominator of a Fraction

46: Identifying Fraction Parts

47: Proper and Improper Fractions

48: Converting Mixed Numbers to Improper Fractions

49: Changing an Improper Fraction to a Mixed Number

50: Recognizing Divisibility

51: Finding Factors of a Number

52: Prime Factorization

53: Recognizing Prime Numbers

54: Equivalent Fractions Example

55: Fractions in lowest terms

56: Comparing Fractions

57: Comparing Fractions 2

58: Multiplying Fractions

59: Multiplying Mixed Numbers

60: Multiplying Fractions and Mixed Numbers

61: Multiplying Fractions Word Problem

62: Reciprocal of a Mixed Number

63: Dividing Fractions Example

64: Dividing Mixed Numbers

65: Dividing Mixed Numbers and Fractions

66: Dividing Fractions Word Problem

67: Adding Fractions with Like Denominators

68: Least Common Multiple (LCM)

69: Finding Common Denominators

70: Adding Fractions with Unlike Denominators

71: Adding Mixed Numbers

72: Adding Mixed Numbers with Unlike Denominators

73: Adding Mixed Numbers Word Problem

74: Subtracting Fractions

75: Subtracting Mixed Numbers

76: Subtracting Mixed Numbers 2

77: Subtracting Mixed Numbers Word Problem

78: Decimal Place Value

79: Decimal Place Value 2

80: Decimals and Fractions

81: Converting Fractions to Decimals Example

82: Comparing Decimals

83: Rounding Decimals

84: Decimals on a Number Line

85: Comparing Decimals 4

86: Adding Decimals

87: Subtracting Decimals

88: Subtracting Decimals Word Problem

89: Multiplying Decimals

90: Multiplying a Decimal by a Power of 10

91: Dividing Decimals

92: Dividing a Decimal by a Power of 10

93: Dividing Decimals 2.1

94: Mulitplyling Decimals 3

95: Estimation with Decimals

96: Ratios as Fractions in Simplest Form

97: Simplifying Rates and Ratios

98: Finding Unit Rates

99: Finding Unit Prices

100: Understanding Proportions

101: Find an Unknown in a Proportion

102: Find an Unknown in a Proportion 2

103: Describing the Meaning of Percent

104: Describing the Meaning of Percent 2

105: Representing a number as a decimal, percent, and fraction

106: Representing a number as a decimal, percent, and fraction 2

107: Identifying Percent Amount and Base

108: Solving Percent Problems 2

109: Solving Percent Problems 3

110: Unit Conversion with Fractions

111: Adding different units of length

112: Converting units of length

113: Converting pounds to ounces

114: Adding different units for weight

115: Application problems involving units of weight

116: Converting Gallons to quarts pints and cups

117: Performing arithmetic calculations on units of volume

118: Solving application problems involving units of volume

119: U.S. Customary and Metric units

120: Conversion between metric units

121: Converting within the metric system

122: Perimeter and Unit Conversion

123: Comparing Celsius and Farenheit temperature scales

124: Converting Farenheit to Celsius

125: Congruent and Similar Triangles

126: Similar Triangles Corresponding Sides and Angles

127: Missing Measurements for Similar Triangles

128: Application of Similar Triangles

129: Using the Pythagorean Theorem

130: Pythagorean Theorem Application

131: Quadrilateral Properties

132: Parts of a Circle

133: Circumference of a Circle

134: Area of a Circle

135: Area and Perimeter of Composite Figures

136: Identifying Geometric Solids

137: Volume of a Composite Shape

138: Identifying Rays

139: Acute Obtuse and Right Angles

140: Identifying Parallel and Perpendicular Lines

141: Identifying Complementary and Supplementary Angles

142: Finding Missing Angles

143: Perimeter of a Polygon

144: Area of a Trapezoid

145: Perimeter and Area of a Non-Standard Polygon

146: Volume of a Sphere