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Stage 25

Objectives
  • Add, subtract, multiply and divide whole numbers and decimal number
  • Comprehend, reason and solve word problems using arithmetic skills involving whole and decimal numbers
  • Hone arithmetic skills by solving problems that require conversion among different number types
  • Develop critical thinking skills around arithmetic operations using quick estimation and rounding methods
Unit 1: Addition and subtraction of whole numbers up to billions

Students practice addition and subtraction of whole numbers up to billions. In addition to basic skills, students apply addition and subtraction techniques to solve simple and multi-step word problems.

Unit Review
  1. Vertical addition and subtraction of numbers in thousands
  2. Addition and subtraction of numbers up to millions
  3. Addition and subtraction of numbers up to billions
  4. Addition and subtraction with up to three numbers
  5. Addition and subtraction with three or more numbers
  6. Addition and subtraction word problems
  7. Application of approximation in addition and subtraction
Unit 2: Critical thinking - addition and subtraction of whole numbers

Students learn to solve problems using addition and subtraction skills. They apply estimation and elimination techniques to solve problems quickly.

Unit Review
  1. Match with addition and subtraction expression
  2. Addition and subtraction - compare two expressions
  3. Addition and subtraction - Find the missing number
  4. Addition and subtraction - Find the missing number in an inequality
  5. Addition and subtraction - find the missing digits
  6. Select numbers to make a sum or difference
Unit 3: Multiplication and division of large numbers

Students practice multiplication and division of large numbers. They use the skills to solve simple word problems, and also apply estimation to solve problems quickly.

Unit Review
  1. Multiplication of two numbers up to two digits
  2. Multiplication of two numbers with two or more digits
  3. Division of two numbers by one-digit numbers
  4. Division of two numbers by two-digit numbers
  5. Multiplication and division of larger numbers
  6. Multiplication of two or more numbers up to three digits
  7. Find quotient and remainder
  8. Multiplication of three numbers - word problems
  9. Division by two-digit numbers - word problems
  10. Multiplication - estimation-based word problems
  11. Properties of arithmetic operations
Unit 4: Critical thinking - multiplication and division of whole numbers

Students learn to solve problems using their knowledge of multiplication and division. They use estimation and elimination techniques, multiplication and division rules to solve problems quickly.

Unit Review
  1. Match with multiplication and division equation
  2. Multiplication and division - compare two expressions
  3. Multiplication and division - Find the missing number
  4. Multiplication and division - Find the missing number in an inequality
  5. Multiplication and division - find the missing digits
  6. Select numbers to make a product or quotient
Unit 5: Addition, subtraction, multiplication, and division of decimal numbers

Students practice addition, subtraction, multiplication, and division of decimal numbers. In addition to basic skills, students apply arithmetic skills to solve simple and multi-step word problems.

Unit Review
  1. Add and subtract two decimal numbers
  2. Addition and subtraction involving two or more decimal numbers
  3. Multiplication of decimal number by whole numbers
  4. Multiplication of decimal numbers
  5. Division with powers of 10
  6. Division with decimal quotient
  7. Division of decimal numbers
  8. Multiplication of three decimal numbers
Unit 6: Critical thinking - addition, subtraction, multiplication, and division of decimal numbers

Students learn to solve problems using various arithmetic operations. They apply estimation and elimination techniques to solve problems quickly.

Unit Review
  1. Match arithmetic expressions to a decimal number
  2. Match mixed arithmetic expressions to a decimal number
  3. Compare two decimal number expressions
  4. Find the missing number
  5. Find the missing number in an inequality
  6. Find missing digits
  7. Select numbers to make a sum, difference, product, or quotient