adding with unlike denominators taking what we already know and using it to help us solve something...
TRANSCRIPT
![Page 1: Adding with Unlike Denominators Taking what we already know and using it to help us solve something new! 1/43/8 1/16 Deb Hill: LFES](https://reader036.vdocument.in/reader036/viewer/2022070305/55158a4b550346a1418b587a/html5/thumbnails/1.jpg)
Adding with Unlike Denominators
Taking what we already know and using it to help us solve something
new!
1/41/4 3/83/8 1/161/16
Deb Hill: LFES
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Adding Fractions
• Don’t forget to update your Table of Contents
• On your new page write the following problems if you have not already done so.
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Adding Fractions with Unlike Denominators
1.1/16 + 1/4 = ____
2.1/8 + 1/4 = ____
3.1/8 + 1/16 = ____
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You already know the answers
Let’s think back to…
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QUARTQUART PINTPINT CUPCUPGALLONGALLON
Remember?
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1 Gallon1 Gallon
Here is the way they “stack-up.”
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1 Quart1 Quart 1 Pint1 Pint1 Gallon1 Gallon
1 Pint 1 Pint = 2 cups2 cups1 Quart1 Quart = 2 pints 2 pints
1 Quart1 Quart = 4 cups4 cups
1 Gallon1 Gallon = 4 quarts 4 quarts
1 Gallon1 Gallon = 8 pints 8 pints
1 Gallon1 Gallon = 16 cups 16 cups
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Remember how we built “Gallon Man?”
1 GALLON1 GALLON
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One Gallon One Gallon = Four Quarts
“Gallon Man” and quartsquarts
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1 Quart 1 Quart = 2 Pints2 Pints
1 Gallon 1 Gallon = 4 quarts 4 quarts = (44) (22) = 8 pints8 pints
“Gallon Man” and pintspints
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One Pint One Pint = Two CupsTwo Cups
1 Gallon 1 Gallon = 4 4 quartquarts = (44) (22) = 8 pints 8 pints = (88) (22) = 16 cups16 cups
“Gallon Man” and cupscups
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How many quartsquarts in a gallongallon?
Right!Four quarts Four quarts = one gallonone gallon!
Let’s do some more.
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How many pintspints in a quart?
Right again ! Two pints Two pints = one quartone quart.
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How many pintspints in a gallongallon?
This is not even hard for you! Eight pints Eight pints = one gallonone gallon.
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How many cupscups in a pintpint?
None of these are difficult. Two cupsTwo cups = one pintone pint
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How many cups cups in a quart?
This is easy! Four cups Four cups = one one quartquart
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How many cupscups in a gallongallon?
Count all of the extremes. 16 cups16 cups = 1 gallon1 gallon
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Gallon Man can help us some more.
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You know the Gallon Gallon Man along with all of his parts: quarts, pintspints, and cupscups.
The Gallon ManThe Gallon Man
Let’ draw another gallon man and label his parts using fractions.
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This turns Gallon Man into…
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One gallongallon = One whole
1
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One gallongallon = 1 whole There are 4 quarts 4 quarts in one gallonone gallon, so each quartquart is 1of 4 parts, or 1/41/4 of a gallongallon .
11/4
1/41/4 + 1/41/4 + 1/41/4 + 1/41/4 = 4/4 = 1.
1/4
“Fraction Friend” and quartersquarters
1/4 1/4
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There are 8 pints 8 pints in one gallonone gallon, so each pintpint is 1of 8 parts, or 1/81/8 of a gallongallon .
1/8 1/8
1/8
1/81/81/8 1/8
1/8
1/8 1/8 + 1/81/8 + 1/81/8 + 1/81/8 + 1/81/8 + 1/81/8 + 1/81/8 + 1/81/8 = 8/8 = 1.
“Fraction Friend” and eightseights
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There are 16 cups 16 cups in one gallonone gallon, so each cupcup is 1of 16 parts, or 1/161/16 of a gallongallon .
1/16
1/16
1/16
1/16
1/16
1/16
1/16
1/16
1/16
1/16
1/16
1/16 1/161/16
1/161/16
1/161/16 + 1/161/16 + 1/161/16 + 1/161/16 + 1/161/16 + 1/161/16 + 1/161/16 + 1/161/16 + 1/161/16 + 1/16 1/16 + 1/161/16 + 1/161/16 + 1/161/16 + 1/161/16 + 1/161/16 + 1/161/16 = 16/16 = 1.
“Fraction Friend” and sixteenthssixteenths
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1/161/16 + 1/41/4 =
1/16 1/16
1/4
Let’s do this one.
1/41/4 = 1/161/16 + 1/161/16 + 1/161/16 + 1/161/16 = 4/16
Therefore, 1/161/16 + 1/41/4 = 1/161/16 + 4/16 = 5/16
1/16
1/16
1/16
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You try… 1/81/8 + 1/41/4 =
Here’s another one.
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You got it…
1/41/4 = 1/81/8 + 1/81/8 = 2/8
1/8
1/4
1/8
1/8
Therefore, 1/8 1/8 + 1/41/4
= 1/81/8 + 2/8 = 3/8
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And…
1/81/8 + 1/16 1/16 =
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Couldn’t fool you 1/81/8 = 1/161/16 + 1/161/16
=2/16
1/161/8
1/16
Therefore, 1/81/8 + 1/161/16 = 2/16 + 1/16 = 3/16
1/16
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The Gallon ManGallon Man helps us remember: quarts, pintspints and cupscups.
Gallon Man & FriendGallon Man & Friend
Fraction Friend helps us with: quartersquarters, eightseights and sixteenthssixteenths.
Now let’s see if we can apply what we have learned from Fraction Friend to fractions with other denominations .