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Subscribe to Homeschool Math Newsletter - filled with math teaching information  February 2010 newsletter
Latest from my blog This is where you'll find the latest happenings, news, & ideas in math teaching Math teaching videos My videos at YouTube show you how to teach concepts.
Multiply & divide decimals by 10, 100, or 1000
Hover your mouse above to open a menu of various worksheets you can generate for free! Advice, reviews, and resources to help you choose a math curriculum! Games you can play online, interactive tutorials, fun math websites and more. Arranged by topic/level for ease of use. Learn how to TEACH concepts or about general concerns in math education. Reviews In-depth reviews of math products Math help & tutoring A list of free message boards, math help websites, and online tutoring services. My Amazon Store See some math products I recommend. I have two games on my site, plus links to many. |
The ideas in this place value lesson are taken from the place value ebook that I sell at MathMammoth.com. Only a few examples of each problem type are shown; you should make more problems of each kind for the student. Which number is greater?
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Study the above pictures. Do we first compare how many TENS the numbers have or how many ONES the numbers have?
- Compare first how many ________ the numbers have.
- If the numbers have the same amount of _______, then compare the ________.
For example,
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92 has more TENS than 89. Therefore 92 is greater than 89.
- 62 has the same amount of TENS as 66, but it has less ONES than 66. Therefore 62 is less than 66.
The symbol > means "greater than", and
< means "less than".
The open end or open mouth of the symbol ALWAYS points to the bigger
number.
For example,
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3 < 5 |
14 > 3 |
60 > 50 |
48 < 99 |
7 < 17 |
You can also use the number line for help.
Since 44 comes before 47 when you read the number line from left to right, 44 < 47.
Example problem types
1. For each number, draw sticks to represent the tens and dots to represent the ones. Then write either < or > in between the two numbers.
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2. Find the numbers on the number line and write either < or >.
[number line available in the ebook]
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80 < 88 90 88 |
95 85 86 94 |
85 91 100 87 |
3. Write either < or > between the two numbers. You can use the number line to help you in a.
[Number line available in the ebook]
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a. 50 < 55 57 73 65 46 |
d. 42 24 15 55 53 35 |
4. Put the numbers in order.
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68, 67, 46 ___< ___< ___ |
33, 53, 37 ___< ___< ___ |
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23, 31, 56, 32 ___< ___< ___< ___ |
26, 69, 66, 46 ___< ___< ___< ___ |
5. Compare the expressions and write <, >, or = .
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15 |
10 + 5 | 30 + 5 | 36 | 70 + 4 | 80 + 1 | |||||
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5 + 20 |
30 + 5 | 70 + 2 | 70 + 7 | 80 + 5 | 8 + 50 |
6. What are these numbers? All numbers are less than 100.
| a) "I am more than 55 and less than 65. I
have the same amount of ones as 27." |
| e) "I don't have any whole tens. If
you add five to me, you get a dozen." |
The ideas in this place value lesson are taken from the place value ebook that I sell at MathMammoth.com. Only a few examples of each problem type are shown; you should make more problems of each kind for the student.
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Copyright 2003-2010 Maria Miller
http://www.homeschoolmath.net/