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 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 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 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 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 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.