GCSE›Edexcel GCSE Maths›Mind mapsNumber OperationsEdexcel GCSE Maths: Mind mapStudy pack PDFAlso for this subtopic:Revision notesFlashcardsSubtopic testCover factsComparingSymbols: =, ≠, <, >, ≤, ≥Further right on the number line is largerSo −2>−5-2 > -5−2>−5Convert to decimals to compare fractionsNegative numbersSame signs multiply or divide → positiveDifferent signs → negative−7×−3=21-7 \times -3 = 21−7×−3=21−7×3=−21-7 \times 3 = -21−7×3=−21Place valueAligning decimal points for add and subtractMultiplying decimals: multiply as whole numbers firstThen count total decimal places0.4×0.03=0.0120.4 \times 0.03 = 0.0120.4×0.03=0.012Number operationsthe four operations −×÷BIDMASBrackets, Indices, DM, ASDivide and multiply left to rightInverse operations undo each other3+4×22=193 + 4 \times 2^2 = 193+4×22=19CountingList outcomes systematicallyProduct rule: multiply the options4 fillings, 3 breads → 12 sandwichesExam tips−8-8−8 is less than −3-3−3Show each BIDMAS step on its own lineMethod marks come from correct order