Unit 1: Number and place value

Large numbers, number properties and efficient methods for all four operations.

• 1.1 Large numbers and lakh – How do we read 1,00,000 and 100 000?
• 1.2 Number properties – Odd, even, prime or square?
• 1.3 Mental addition – Add big numbers in your head.
• 1.4 Written addition – Column addition with 4- and 5-digit numbers.
• 1.5 Mental subtraction – Find differences quickly.
• 1.6 Written subtraction – Column subtraction with exchanging.
• 1.7 Multiplication and division facts – Know your facts to 12 × 12.
• 1.8 Written multiplication – Multiply 3-digit numbers and 2-digit by 2-digit.
• 1.9 Written division – Divide 3-digit numbers by 1-digit numbers.
• 1.10 HCF and LCM – Factor trees, common factors and common multiples.