A series of books for children 10 years old contains a variety of entertaining tasks and contributes to the development of logic, analytical and mathematical abilities, memory, attention, and concentration.

Math Country

3000 Examples and Problems (10+ y.o.)

3000 Examples and Problems (10+ y.o.)

Our workbooks assist children to invest their time meaningfully, learn the school curriculum successfully and participate in mathematical competitions. At the same time using these workbooks, teachers can conduct entertaining lessons and classes, as well as parents can use workbooks as a supporting material to improve children’s math grades.

Using our workbooks students learns to quickly perform verbal arithmetic operations: addition, subtraction of numbers, decimals, and fractions; multiplication and division of multi-digit numbers, fractions, and decimals; find a value of numerical expressions containing integers and decimals; round whole numbers and decimals, evaluate numerical expressions; use the primary units of length, mass, time, speed, area, volume; convert one unit of measure to another; solve word problems, including problems related to fractions and percentages, and much more.

Regular exercises form an ability to apply acquired knowledge and skills in practical activities and everyday life, solve simple practical calculation problems, using, if necessary, reference materials and a calculator; estimate and evaluate the result of calculations; check the calculation result applying various techniques; interpret the results of solved problems, taking into account the limitations associated with the real properties of the processes and phenomena under consideration.

There is a list of key topics that 5th graders should master. Most of them covered with our workbooks and printable worksheets.

Decimals. Operations with decimals

  • Decimal place value
  • Decimals on the number line
  • Decimals in expanded form
  • Decimals in written form
  • Decimals in different forms
  • Comparing decimals
  • Rounding decimals
  • Common fractions and decimals
  • Adding decimals: tenth and hundreds
  • Subtracting decimals: tenth and hundreds
  • Multiplying decimals and whole numbers
  • Multiplying decimals strategies
  • Divide whole numbers to get a decimal quotient
  • Divide decimals by whole numbers
  • Divide whole numbers by decimals

Multi-digit multiplication and division

  • Multi-digit multiplication estimation
  • Multi-digit multiplication
  • Multi-digit division estimation
  • Multi-digit division

Fractions. Add and subtract fractions

  • Strategies for adding and subtracting fractions with like denominators
  • Common denominators
  • Adding and subtracting fractions with unlike denominators
  • Adding and subtracting mixed numbers with unlike denominators

Fractions. Multiply and divide fractions

  • Multiplying fractions and whole numbers
  • Multiplying fractions
  • Multiplying mixed numbers
  • Area of rectangles with fraction side lengths
  • Fractions as division
  • Relate fraction division to fraction multiplication
  • Dividing unit fractions by whole numbers
  • Dividing whole numbers by unit fractions

Exponents. Powers of ten

  • Multiplying and dividing whole numbers by 10, 100, and 1000
  • Multiplying and dividing decimals by 10, 100, and 1000
  • Powers of 10
  • Multiplying and dividing with powers of 10
  • Comparing decimal place values
  • Exponents


  • Volume with unit cubes
  • Volume of rectangular prisms
  • Decompose figures to find volume

Coordinate plane

Algebraic expressions and equations


  • Converting units of time
  • Converting metric units
  • Converting US Customary units

Data and graphs

  • Graph data on line plots
  • Interpret data on line plots
  • Venn diagrams

Beginning of geometry

  • Triangles
  • Quadrilaterals
  • Properties of shapes

Our workbooks

In addition, all workbooks contain problems that teach students to collect, sort, analyze, and use all kinds of information. Children work with tables, diagrams, and graphs, analyze the data, and solve logical problems. 

3000 Examples and Problems

Workbooks for 10+ years old “3000 Examples and Problems”

Part 1

Part 2

Part 3

Multiplication tables in 12 lessons

Logic 1

Logic 2

Logic 3