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class 7 chapter 1 integers summary revision notes

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Here is what you need, flashcards like short, summarised notes that will help you revise 5 minutes before the exam or tests .... as study with flases are magical for marks.

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QUICK REFERENCE CARD

Concept Rule


Adding two negatives (–a) + (–b) = –(a + b)


Adding opposite signs a + (–b) = a – b


Subtracting a negative a – (–b) = a + b


Same signs multiply Positive result


Different signs multiply Negative result


Division by zero Not defined


BODMAS order Brackets → Orders → DM (L→R) → AS
(L→R)




Formulas to remember:

●​ a + (–a) = 0 (additive inverse)
●​ a × 0 = 0 (zero property)
●​ (–a) × (–b) = ab
●​ (–1) × a = –a

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