42510011 0010 1010 1101 0001 0100 1011

3rd GradeComparing and Ordering

Numbers

Created by

Barbara Fugitt

Texarkana ISD

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Vocabulary

• Place value - The value of a place of a digit in a number.

• Digits - Any one of the tens symbols 0, 1, 2, 3, 4, 5, 6, 7, 8, or 9 used to write numbers.

• Greater Than (>) - A symbol used to compare two numbers, with the greater number given first. Example: 8 > 6

• Less Than (<) - A symbol used to compare two numbers, with the lesser number given first. Example: 6 < 8

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Vocabulary

• Equal (=) - Two numbers or number sentences being alike in value on either side.

• Compare - To examine 2 or more objects or people to find out how they are alike and how they are different.

• Ordering - To put numbers or objects in a specific order. Example: listing from greatest to least or least to greatest.

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Comparing Numbers

• Comparing numbers means to show one number is more than, less than, or equal to another number.

• We use symbols to show the relationship.

> = Greater than

< = Less than

= means equal to

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Think of the signs like the mouth of an alligator. The alligator is greedy and always eats the larger number.

58 > 25Greater than symbol

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No matter which way he faces, he still wants to eat the bigger number.

25 < 58Less than symbol

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When two numbers are the same, you will use the equal sign to compare them.

25 = 25

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Lets try some!

16 25<

>155 130

335 675<

1,275 1,105

>

5,607 7,902<

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Ordering Numbers

• Ordering numbers is putting numbers in a given order, either from least to greatest or greatest to least.

• 1, 3, 7, 9, 11 is listed from least to greatest.

• 11, 9, 7, 3, 1 is listed from greatest to least.

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Ordering Numbers• Lets put these numbers in

order from least to greatest.

• To put these in order, start in the hundreds place.

• Look at the 5, 3, and 7. Out of those three numbers, which is the smallest?

536

365

725The 3 is the smallest number, therefore 365 is the smallest number.

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Ordering Numbers• We see that 365 is the

smallest number.

• Now lets compare the 5 and the 7.

• Which one of these two is smaller?

536

365

725The 5 is the smallest number out of the two, therefore 536 is the next smallest number in the set.

1

2

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Ordering Numbers• We see that 365 is the

smallest number.

• We see that 536 is the middle number.

• Therefore, which is the largest number?

• How would we list them?

536

365

725The 725 is the largest number.

1

2

3

We would list them as 365, 536, 725.

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Lets try one.Put these numbers in order from

least to greatest.

536, 126, 227

126, 227, 536

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Lets try one.Put these numbers in order from

greatest to least.

2,603; 5,892; 1,879

5,892; 2,603; 1,879

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Which one belongs in the middle?

125 256

A.136 C. 102

B. 256 D. 302