&&66 *1%7
5HDGDQGZULWHQXPEHUVWRXVLQJEDVHWHQQXPHUDOVQXPEHU
NS 1.2 Use words, models, and expanded forms (e.g., 45 ! 4 tens " 5) to
QDPHVDQGH[SDQGHGIRUP
represent numbers (to 1,000).
UNDERLYING SKILLS AND CONCEPTS:
read numbers;
place value
Use Place Value and Expanded Notation
a
K
ey Ide
You can write a 3-digit number as the sum of
hundreds, tens, and ones.
Expanded notation shows the value of each digit
by its place in a number.
1
300 " 0 " 9
3
Te
ns
On
es
You can write 309 in expanded notation.
nd
3 hundreds " 0 tens " 9 ones.
red
s
The number 309 means
Hu
E x am p l E
0
9
B – © CSL Associates, Inc. All rights reserved.
Read: “three hundred, nine.”
E x am p l E
2
You can write an expanded number in standard form.
Add the parts.
400 " 20 " 6 is the same as
Chapter 3 – Lesson 2
400
20
" 6
426
page 29
Name
P RAC T I C E
Write each number in expanded notation.
1
712 _________________
700 10 2
2
583 _________________
500 80 3
3
396 _________________
300 90 6
4
530 500
30 0
_________________
Write each number in standard form.
5
300 10 7 ____________
317
6
200 90 0 ____________
290
7
800 50 9 ____________
859
8
400 10 6 ____________
416
9
600 0 9 ____________
609
10
900 80 3 ____________
983
11
40 8 300
730
90 0 500
348
0 30 700
590
Math
Reasoning
12
Number Sense
MR 1.1
I am a 3-digit number. I have 3 ones and 12 tens.
I have a 1 in the hundreds place.
What number am I?
page 30
123
Chapter 3 – Lesson 2
B – © CSL Associates, Inc. All rights reserved.
Draw a line to show each pair.
Name
P RAC T I C E
Write each number in expanded notation.
1
413 _________________
400 10 3
2
671 _________________
600 70 1
3
587 _________________
500 80 7
4
340 _________________
300 40 0
Write each number in standard form.
5
200 30 5 ____________
235
6
400 80 0 ____________
480
7
700 60 8 ____________
768
8
300 20 5 ____________
325
9
500 0 7 ____________
507
10
800 70 6 ____________
876
11
30 6 200
310
80 0 600
236
0 10 300
680
Math
Reasoning
12
Number Sense
MR 1.1
I am a 3-digit number. I have 5 ones and 16 tens.
I have a 1 in the hundreds place.
What number am I?
page 20
165
Home Resource and Homework
Chapter 3 Lesson 2
B – © CSL Associates, Inc. All rights reserved.
Draw a line to show each pair.
MCX94TEG2Ch01_30.v9.4.1 2/19/01 19:44 Page 55
Name
P RAC T I C E
Write each number in expanded notation.
1
712 _________________
700 10 2
2
583 _________________
500 80 3
3
396 _________________
300 90 6
4
530 500
30 0
_________________
Write each number in standard form.
5
300 10 7 ____________
317
6
200 90 0 ____________
290
7
800 50 9 ____________
859
8
400 10 6 ____________
416
9
600 0 9 ____________
609
10
900 80 3 ____________
983
B – © CSL Associates, Inc. All rights reserved.
Draw a line to show each pair.
11
40 8 300
730
90 0 500
348
0 30 700
590
Math
Reasoning
12
Number Sense
MR 1.1
I am a 3-digit number. I have 3 ones and 12 tens.
I have a 1 in the hundreds place.
What number am I?
Chapter 3 – Lesson 2
123
Student Book Page
page 30
Name
P RAC T I C E
Write each number in expanded notation.
1
413 _________________
400 10 3
2
671 _________________
600 70 1
3
587 _________________
500 80 7
4
340 _________________
300 40 0
Write each number in standard form.
5
200 30 5 ____________
235
6
400 80 0 ____________
480
7
700 60 8 ____________
768
8
300 20 5 ____________
325
9
500 0 7 ____________
507
10
800 70 6 ____________
876
11
30 6 200
310
80 0 600
236
0 10 300
680
Math
Reasoning
12
Number Sense
MR 1.1
I am a 3-digit number. I have 5 ones and 16 tens.
I have a 1 in the hundreds place.
What number am I?
page 20
165
Home Resource and Homework
Chapter 3 Lesson 2
B – © CSL Associates, Inc. All rights reserved.
Draw a line to show each pair.