Comparing Numbers

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Slide 1  Comparing Numbers
 Using <, >, and =

Slide 2  Comparing Numbers
 It is good to know if one number is larger, smaller, or the same as another number.
 Which number is larger 17 or 54? Or are they the same?
 How do we show which is larger?
 17 54

Slide 3  Three Signs: We use three signs to compare numbers. *Think of the less than and greater than signs as alligator mouths. The alligator always eats the larger number.*
 =
 If two values are equal, we use the "equals" sign
 example: 3+2 = 5
 <
 If one value is smaller than the other, we use the "less than" sign.
 example: 2 < 7
 >
 And if one value is bigger than the other, we use the "greater than" sign
 example: 9 > 6

Slide 4  Watch this video about comparing numbers.

Slide 5  Equals Sign =
 Here are some examples of when you use the equal sign.
 4 = 4
 3+3 = 6
 4+3 = 5+2
 19 = 10+9
 45 = 45
 70 = 60 + 10
 100 = 10 tens

Slide 6  Less Than Sign <
 Here are some examples of when you use the less than sign. Remember the alligator always eats the larger number.
 2 < 9
 34 < 43
 10 + 5 < 10 + 9
 11 < 18
 309 < 387
 12 + 1 < 15
 20 + 1 < 20 +6

Slide 7  Greater Than Sign >
 Here are some examples of when you use the greater than sign. Remember the alligator always eats the larger number.
 5 > 2
 36 > 26
 10 + 8 > 10 + 2
 16 > 11
 298 > 271
 13 + 1 > 10
 20 + 8 > 20 + 2

Slide 8  Let’s practice together…
 11 24

Slide 9  Let’s practice together…
 15+5 20

Slide 10  Let’s practice together…
 100 99

Slide 11  Let’s practice together…
 10 5+5

Slide 12  Show me what you know…

Slide 13  Show me what you know…

Slide 14  Show me what you know…

Slide 15  Show me what you know…

Slide 16  Show me what you know…

Slide 17  Show me what you know…

Slide 18  Extra Online Practice
 Comparing numbers through 10: http://www.mathsisfun.com/algebra/comparenumbers10.html
 Comparing numbers through 100: http://www.mathsisfun.com/algebra/comparenumbers100.html

Slide 19  Next Generation Standard
 M.1.NBT.3
 compare two twodigit numbers based on meanings of the tens and ones digits, recording the results of comparisons with the symbols >, =, and <.(CCSS Math.1.NBT.3)

Slide 20  Resources
 http://www.mathsisfun.com/algebra/comparenumbers10.html
 http://www.mathsisfun.com/algebra/comparenumbers100.html
 https://www.youtube.com/watch?v=9ZXEL0yuxwM (video: creative commons)
 http://ipkitten.blogspot.com/2014/12/fridayfantasies_19.html (Slide 1 graphic: creative commons)
 http://mrsjlbryan.wikispaces.com/Math+Tools (slide 5 graphic: creative commons
 https://www.flickr.com/photos/evelynsaenz/6689614551/ (Slide 6 and 7 graphics: creative commons