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Add and subtract integers
Add and subtract two integers.

Add and subtract integers - expression
Remove the parentheses and calculate.

EXAMPLE OF A TASK

-52 + (-14) =

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Add and subtract integers

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Add and subtract integers

The rules for adding and subtracting integers.

The rule	Example
+(+a) = a	+(+7) = +7
+(−a) = −a	+(−5) = −5
−(+a) = −a	−(+9) = −9
−(−a) = +a	−(−4) = +4

Add and subtract integers - expression

The rules for removing parentheses

[1] When parentheses are preceded by a plus sign (+), remove the parentheses, numbers within the parentheses RETAIN the sign.

EXAMPLE
4 + (−7 + 2) =
Remove the parentheses.
Numbers within the parentheses RETAIN the sign.
4 + (−7 + 2) =
4 − 7 + 2

[2] When parentheses are preceded by a minus sign (−), remove the parentheses, numbers within the parentheses CHANGE the sign.

EXAMPLE
2 − (4 − 5) =
Remove the parentheses.
Numbers within the parentheses CHANGE the sign.
Change +4 to −4 and −5 to +5.
2 − (4 − 5) =
2 − 4 + 5

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INTERACTIVE EXERCISES, WORKSHEETS - YEAR 7

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Add and subtract integers

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Worksheets - Add and subtract integers

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