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MULTIPLICATION OF FRACTIONS

MULTIPLICATION OF FRACTIONS. I invited over a friend, baked a pie, Then, decided a little piece I'd try. In an hour my friend arrived. What remained made them cry But, just a bit they ate with a sigh. So all alone, I finished the pie. .

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MULTIPLICATION OF FRACTIONS

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  1. MULTIPLICATION OF FRACTIONS I invited over a friend, baked a pie,Then, decided a little piece I'd try.In an hour my friend arrived.What remained made them cryBut, just a bit they ate with a sigh.So all alone, I finished the pie.  Once students can multiply a whole number by a fraction on the abacus, a sequence of manipulations can easily be learned to solve multiplication and division of fraction problems. It is again helpful to direct the solution process with a story or image sequence. The poem above may be the bases for such a sequence.

  2. I invited over a friend, baked a pie,Then, decided a little piece I'd try.In an hour my friend arrived.What remained made them cryBut, just a bit they ate with a sigh.So all alone, I finished the pie.  In the fraction problem shown below, the second fraction, reading from left to right, is how much of the pie remained when the friend arrived, and the first fraction is how much of what remained the friend ate.

  3. THREE-FOURTHS OF FOUR CORRESPONDS TOTHREE-FOURTHS OF TWELVE To begin the solution process have the students multiply the denominators, to see into how many pieces the pie is sliced. This product, twelve, is the denominator of the solution. Direct students to write it under the fraction bar.

  4. TWO-THIRD0F THREECORRESPONDS TOTWO-THIRDSOF NINE Now to find the numerator students must figure out how many pieces of the whole pie the friend ate. Have students first find how many pieces remained when the friend arrived, by taking three-fourths of twelve, the whole pie. The answer is nine.

  5. Then students can find out how much of the three-fourths or nine pieces the friend ate, by taking two-thirds of the nine. As shown above. the answer is six. Direct students to write six above the fraction bar. 

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