March 16, 2023 Craig BartonArithmetic, Number

Related calculations (add and subtract) spider

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January 7, 2021 Craig BartonArithmetic, Negative numbers, Number

Positive, negative or zero: Adding and subtracting

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June 25, 2018July 25, 2018 Craig BartonNumber, Order of operations (BIDMAS)

Add and subtract

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February 20, 2018July 31, 2018 Craig BartonArithmetic, Number

Mental subtraction

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