Coaching Centre
Chapter 1: Computation with positive integers Notes
Place value, mental and written methods for adding, subtracting, multiplying and dividing whole numbers, estimating, rounding and the order of operations.
Sections
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1A Place value and number systems Mastered
Place value in the Hindu-Arabic number system, expanded form, comparing numbers, and how ancient Egyptian, Babylonian and Roman numerals worked.
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1B Adding and subtracting whole numbers Mastered
Mental strategies (partitioning, compensating, doubling) and the written algorithms for adding and subtracting whole numbers, with carrying and borrowing.
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1C Multiplying whole numbers Mastered
Times tables, mental multiplication strategies, multiplying by 10, 100 and 1000, and the long multiplication algorithm for larger numbers.
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1D Dividing whole numbers and remainders Mastered
Short division, division with remainders, writing remainders as fractions, and deciding what to do with a remainder in word problems.
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1E Estimating and rounding Mastered
Rounding whole numbers to the nearest 10, 100 or 1000, rounding to the leading digit, and estimating answers to check calculations.
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1F Order of operations Mastered
The order of operations for whole numbers: brackets first, then multiplication and division from left to right, then addition and subtraction from left to right.