Adding and subtracting (Edexcel GCSE Maths): Flashcards
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12 cards from this deck
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Practise the cards
12 cards from this deck
Two methods for adding/subtracting without calculator
Two methods for adding/subtracting without calculator
Mental methods and column methods
Definition of mental methods
Definition of mental methods
Quick strategies to add/subtract numbers in your head
Addition mental method technique
Addition mental method technique
Break numbers into manageable parts (tens and units)
Subtraction mental method name
Subtraction mental method name
Counting up method
How counting up method works
How counting up method works
Count up from smaller to larger number in jumps
Direction to work in column method
Direction to work in column method
Right to left (start with units column)
Golden rule for column methods
Golden rule for column methods
Always start with units column, work left
In column addition, if sum is 10+
In column addition, if sum is 10+
Write units digit, carry tens digit to next column
Exchanging in column subtraction
Exchanging in column subtraction
Borrowing 10 from next column when top digit smaller
When to use exchanging
When to use exchanging
When top digit is smaller than bottom digit
Why show working in exams
Why show working in exams
For markers to follow and award partial marks
How to check column method answers
How to check column method answers
Use mental methods to verify answer makes sense