Embed Size (px)
DESCRIPTION
This is a slideshow to assist in lessons that have to do with numbers. Teaching students about ones, tens, number words, and place value. Enjoy!
Citation preview
Place Value: Numbers to 100Lessons 4-1 to 4-5
Devyn Singleton
Cohort 21 Tech 290
September 17, 2008
Standards
• NS 1.1 (Key standard) Count, read, and write whole numbers to 1,000 and identify the place value for each digit.
• NS 1.3 (Key standard) Order and compare whole numbers to 1,000 by using the symbols <, =, >.
Numbers
Models for Tens
• How can you use ones to make tens?
• Ones
• Ones are separated • Tens
• Connect ten ones together to make a ten
Models for Tens
• 10 ones = 1 ten train
• 20 ones = 2 ten trains
Models for Tens
1.____ ones
Make ____ tens
2.____ ones
Make ____ tens
Do you understand?
Why do we group ones into tens?
Models for Tens and Ones
• In a two-digit number, what do the first and second digits tell you?
• Show 23.
___ tens ___ ones
Tens Ones
Models for Tens and Ones
• Circle groups of ten
How many tens?
How many ones?
Put the tens and ones together.
What number is this model showing?
Models for Tens and Ones
Circle groups of ten
1. ____ tens ____ ones
____
2.
____ ten ____ ones
____
How many tens are in 54? How do you know?
Reading and Writing Numbers
• How are numbers through 99 written as words?
• Number words• Digit
1. 28___ tens ___ ones_______________2. 56___ tens ___ones_______________
Ones Teens Tens1 One
2 ______
3 three
____ four
5 five
6 ______
___seven
8 ______
9 nine
11 eleven
__ twelve
13 thirteen14 fourteen
__ fifteen
16 ______17 seventeen
__ eighteen
19 nineteen
10 ten
20 _____
___ thirty
40 _____
50 fifty
60 sixty70 seventy
___ eighty
90 ninety
Reading and Writing Numbers
Ones Teens Tens1 One
2 ______
3 three
____ four
5 five
6 ______
___seven
8 ______
9 nine
11 eleven
__ twelve
13 thirteen14 fourteen
__ fifteen
16 ______17 seventeen
__ eighteen
19 nineteen
10 ten
20 _____
___ thirty
40 _____
50 fifty
60 sixty70 seventy
___ eighty
90 ninety
The number 64 has ___Digits.
6 tens is_______
4 ones is ________
The number word for 60Is _________.
The number word for 4Is _________.
Put the number words together and add a hyphen: _____________
tens ones
Reading and Writing Numbers
Ones Teens Tens1 One
2 ______
3 three
____ four
5 five
6 ______
___seven
8 ______
9 nine
11 eleven
__ twelve
13 thirteen14 fourteen
__ fifteen
16 ______17 seventeen
__ eighteen
19 nineteen
10 ten
20 _____
___ thirty
40 _____
50 fifty
60 sixty70 seventy
___ eighty
90 ninety
Write the number.1. Fifty-six _____2. Fourteen ______
Write the number word.1. 66 ____________2. 17 ____________
What is the same about theNumber words for 6, 16,And 64? What is different?
Using Models to Compare Numbers
• How can you compare two-digit numbers?
• Greater than• Less than
1. 37 73
2. 43 34
3. 62 26
Tens Ones
3 7
4 3
6 2
Tens Ones
7 3
3 4
2 6
Using Models to Compare Numbers
Tens Ones • Which number is greater? Compare the numbers.
• Do 34 and 26 have the same number of tens? How do you know?
Tens Ones
34 26
34 has more tens than 26.
34 26
Using Models to Compare Numbers
• Write the number of cubes. Circle is greater than or is less than.
1.
____ ____
2.
____ ____
Using Symbols to Compare Numbers
• How can you use the symbols >, <, and = to compare two-digit numbers?
• Greater than >• Less than <• Equal to =
Tens Ones
3 7
Tens Ones
5 2
Tens Ones
2 8
Tens Ones
6 1
Tens Ones
4 3
Tens Ones
4 3
Using Symbols to Compare Numbers
• You can change the order of the numbers you compare.
23 is greater than 15
15 is less than 23
You can compare numbers using >, < and =.
The open part faces the greater number.
23 > 15 twenty-three is greater than fifteen
15 < 23 fifteen is less than twenty-three.
Using Symbols to Compare Numbers
• Write >, <, or = in the
1. 25 16 2. 14 30
3. 27 27 4. 34 36
5. 25 16 6. 19 19
Which number is greater? How do you know?83 15
Quiz
1. 30 ones make ____ tens
2. How many cubes?
3. Write the number word for the number 37.
______________
4. 25 22 5. 33 33 6. 67 76
References
• Images provided by:
Microsoft Office Clip Art
http://office.microsoft.com/clipart
