Module 9 â Reorganized - eusddata
Module 9 â Reorganized - eusddata
Module 9 â Reorganized - eusddata
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Key Mathematical Concepts:<br />
Harcourt Math – Grade 5<br />
Operation with Fractions: Multiplication and Division<br />
Chapters 21, and 22<br />
MODULE 9<br />
• The word “of” as used in “ 1/4 of 2/3 “ indicates multiplication.<br />
• Division of fractions asks the same question asked in division of whole numbers:<br />
12 ÷ 4 asks “How many 4’s are in 12?”<br />
1 1/2 ÷ 1/4 asks “How many 1/4’s are in 1 1/2?”<br />
• Multiplication and division are inverse operations. This means that dividing by a whole<br />
number or fraction has the same answer as multiplying by the reciprocal of the divisor.<br />
Revised 2/09/04 8
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