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The ideas in this fraction lesson are taken from the Math Mammoth Fractions 2 book. Only a few examples of each problem type are shown; you should make more problems of each kind for the student. Dividing Mixed Numbers
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To solve division, multiply by the reciprocal of the divisor.
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| The hardest part of dividing mixed numbers is to REMEMBER first to change them into fractions. | ||||||||||||||||||||||||||||||||||||||||||
1. Divide.
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| [available in the book] |
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2. Now you get to be a
“detective” like teachers often need to be, and find out what the kids did wrong.
In each
case, a. explain the mistake made, and b. solve the problem the right way.
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a. Jenny: “I got this:”
Jenny's mistake:
Correct calculation:
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b. Mark: “My calculation gives:”
Mark's mistake:
Correct calculation:
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| [available in the book] |
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Another method for dividing fractions |
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1) Change both fractions to equivalent
fractions 2) Divide the numerators only! This method is not necessarily less work, but
it may In the example on the right, we can ask: Well, that is the same as asking how many
times
6 goes to 10? |
Example:
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3. Solve using any method.
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[available in the book] |
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4. Can you divide by half? Remember to think how many times does one-half go into the dividend.
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| [available in the book] | ||||||
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5. a. [available in the book]
b. [available in the book]
c. [available in the book]
d. [available in the book]
6. How many of the same kind of erasers fit into a box with
dimensions 12 in x 10 in x 8 in (length-width-height)?
7. [available in the book]
8. [available in the book]
The ideas in this fraction lesson are taken from the Math Mammoth Fractions 2 book. Only a few examples of each problem type are shown; you should make more problems of each kind for the student.
The fast, FUN, and easy way to learn multiplication. Learn the upper times tales in two sittings using mnemonic stories.
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