



The Primary Mathematics U.S. Edition series of elementary math textbooks and workbooks is meant to be part of a system of learning in which adult supervision and independent practice go hand in hand. The main feature of this series is the use of the Concrete> Pictorial>Abstract approach. The students are provided with the necessary learning experiences beginning with the concrete and pictorial stages, followed by the abstract stage to enable them to learn mathematics meaningfully. This approach encourages active thinking process, communication of mathematical ideas and problem solving. This helps develop the foundation students will need for more advanced mathematics.
Practice exercises are designed to provide the students with further practice after they have done the relevant workbook exercises. Review exercises are provided for cumulative reviews of concepts and skills. All the practice exercises and review exercises are optional exercises.
The color patch is used to invite active participation from the students and to facilitate oral discussion. The students are advised not to write on the color patches.
Above extract from Preface of Primary Mathematics U.S. Edition (reproduced with the permission of the publishers).
The textbooks contain the learning tasks for students to do under adult supervision and interaction, along with practice and review problems. They are meant to be nonconsumable and to be used along with the Primary Mathematics Workbooks.
Answers or answer keys for Primary Mathematics U.S. Edition textbooks and workbooks are found in the teacher's guides and home instructor's guides. Answer keys booklets are also available  one for Primary 13 and one for Primary 46.
Primary Mathematics U.S. Edition 5B
Units highlighted in red are in this U.S. Edition but not in the 3rd Edition of Primary Mathematics.
1. Decimals
 Approximation and Estimation
 Multiplication by Tens, Hundreds or Thousands
 Division by Tens, Hundreds or Thousands
 Multiplying by a 2digit Whole Number
 Conversion of Measurements
REVIEW A
2. Percentage
 Percent
 Writing Fractions as Percentage
 Percentage of a Quantity
3. Average
4. Rate
5. Graphs
REVIEW B
6. Triangles
 Sum of Angles of a Triangle
 Isosceles and Equilateral Triangles
 Drawing Triangles
7. 4sided Figures
 Parallelogram, Rhombuses and Trapezoids
 Drawing Parallelograms and Rhombuses
8. Tessellations
9. Volume
 Cubes and Cuboids
 Finding the Volume of a Solid
REVIEW C
REVIEW D
REVIEW E (extra review exercises on customary measurements)
Samples
Chapter 2: Percentage  Percentage of a Quantity Chapter 3: Average  Average Chapter 6: Triangles  Drawing Triangles
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