Mathematics Teacher (1991) Vol. 84, No. 5
onew equations fromHP: 3 4 24 32+1 •nf'r(I"'P"''"91Mtlht. Aprtll990, Gr•pNntt CeatulatOf' Compari.1ons a.nd Rt"C<Wnmendatk>ns Note: Thrrfl' L., no lurut tu tht numbfr of unit& )'OUr 't('hoQI may pun:ha.Sf C IP!IO Ho-wlo<>l'a<kud l"llmPIU'Y I'Cl20ll 8 And HP has the only calculators that provide the proofl Do your most
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