T2T || FAQ || Ask T2T || Teachers' Lounge || Browse || Search || Thanks || About T2T
View entire discussion
[<< prev] [ next >>]
From: Debra <firstname.lastname@example.org> To: Teacher2Teacher Public Discussion Date: 2005071920:57:22 Subject: explain why we multipy to find the half of a recipe I liked the posts by Gail instructing us to translate the "of" (eg 1/2 of 1/4) into multplication. But we get into a confusion of language usage of the word "divide" when we're trying to find the fraction of a fraction in a recipe. For example: if a recipe calls for 1/2 spoon of salt. How much salt do we need for half a recipe? In colloquial speech, one might say, "divide the recipe in half." Thus erroneous creating a division of fractions rather than multplication. How do we know when a word problem requires multiplication or division?
Math Forum Home || The Math Library || Quick Reference || Math Forum Search