Solving the Decimal Mystery

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Solving the Decimal Mystery
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Who knows how to put words in ABC order?
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See if you can put these words in ABC order

• Heat
• Hear
• Heart
• Heap

• Heap
• Hear
• Heart
• Heat

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Well, guess what?
Decimals work the same way!
7.63
1.97
5.6
4.3
5.2
2.78
8.92
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If you use the ABC order method, which decimal
is larger?
1.86
or
1.68
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Try comparing the numbers.
1.86 1.68
They both have a 1 in the ones place.
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Now what?
In the tenths place, one decimal has an 8 and one
has a 6. Which would you say is the bigger
decimal?
1.86 1.68
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Of Course! Youre Right!
Since 8 is bigger than 6
1.86 is bigger Than 1.68!
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Now try it this way!
You can also put decimals in order using the
money method.
Think
Which would you rather have?
1.68 Or 1.86
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Absolutely!
1.86 is more money than 1.68 so it must be
a bigger decimal
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Lets see you try these decimals Which is the
smaller decimal?
Hint Think ABC order or which is less money
1.25 Or 1.15
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Which is the smaller decimal?
1.25 Or 1.15
They both have a 1 in the ones place.
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Which is the smaller decimal?
1.25 Or 1.15
One decimal has a 2 in the tenths place and one
has a 1 in the tenths place.
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Since 1 is less than 2 1.15 is less than 1.25.
Are you ready for some harder problems?
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Now you try it.
Put each group of decimals in order from the
least to the greatest You can use the ABC
method or the money method.
4.56 5.46 4.65
3.78 3.75 3.67
8.29 8.93 8.92
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Did you get these answers?
3.67 3.75 3.78
4.56 4.65 5.46
8.29 8.92 8.93
GRRReat!
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Now try thisorder these numbers from least to
greatest!
7.89 8.97 7.98
8.79 7.88 9.87
You can do it! Think ABC or .
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Lets see how you did
Keep It Up!
I knew you could do it!
7.88
Almost finished!
7.89
7.98
Good Start!
8.79
8.97
Youve really got it now!
Halfway There!
9.87
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You really are becoming a decimal expert!
Now we can go to the computer lab and practice
ordering decimals using this site http//www.aa
amath.com/B/g52_cox1.htm