Higher Level: Bounds in Calculations (Key for Exam!)

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Higher Level: Bounds in Calculations (Key for Exam!)

To find... Use...
Maximum of A + B UB(A) + UB(B)
Minimum of A + B LB(A) + LB(B)
Maximum of A − B UB(A) − LB(B)
Minimum of A − B LB(A) − UB(B)
Maximum of A × B UB(A) × UB(B)
Minimum of A × B LB(A) × LB(B)
Maximum of A ÷ B UB(A) ÷ LB(B)
Minimum of A ÷ B LB(A) ÷ UB(B)

Memory trick: For division, it's the OPPOSITE - to make a fraction big, make the top big and bottom small!

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