&&66
NS 1.3*1%7
Order and&RPSDUHWZRWZRGLJLWQXPEHUVEDVHGRQPHDQLQJVRIWKHWHQV
compare whole numbers to 1,000 by using
DQGRQHVGLJLWVUHFRUGLQJWKHUHVXOWVRIFRPSDULVRQVZLWKWKHV\PEROV! DQG
UNDERLYING SKILLS AND CONCEPTS:
place value;
read numbers
the symbols ", #, !.
Compare 2-Digit Numbers
a
K
ey Ide
You can use models and symbols to compare 2-digit
numbers.
The symbol for more than is !.
The symbol for less than is ".
The symbol opens to the number that shows more.
The symbol # means “is the same as.”
E x am p l E
1
19
Which is more, 36 or 19?
36 has 3 tens and 6 ones.
19 has 1 ten and 9 ones.
B – © CSL Associates, Inc. All rights reserved.
36 has more tens.
36
You write: 36 ! 19.
You read: “Thirty-six is more than
nineteen.”
E x am p l E
2
>
23
Which is less, 26 or 23?
They have the same number of tens.
So, compare the ones.
26
You write: 23 " 26.
You read: “Twenty-three
is less than twenty-six.”
>
Chapter 3 – Lesson 3
page 31
Name
P RAC T I C E
Write each expression in words.
1
7 14
Seven is less than fourteen.
__________________________________________
2
49 51
Forty-nine is less than fifty-one.
__________________________________________
3
53 48
Fifty-three is more than forty-eight.
__________________________________________
4
91 88
Ninety-one
is more than eighty-eight.
__________________________________________
5
8
11
73
51 41
14 44 39
6
9
12
7
70 42
37 28 28
7
10
13
8
50 60
60 87 91
Solve.
14
Lin has 36 crayons.
Mara has 72 crayons.
Leo has 49 crayons.
Who has the least number of crayons? ___________
Lin
Math
Reasoning
Number Sense
MR 2.1
Is the number sentence true? Explain.
15
true
Possible explanations: You can add numbers in any
order. You can show it with counters.
14 4 4 14
page 32
Chapter 3 – Lesson 3
B – © CSL Associates, Inc. All rights reserved.
Compare. Write , , or .
Name
P RAC T I C E
Write each expression in words.
1
8 15 _______________________________________________
eight is less than fifteen
2
58 62 _______________________________________________
fifty-eight is less than sixty-two
3
45 39 _______________________________________________
forty-five is more than thirty-nine
4
82 77 _______________________________________________
eighty-two is more than seventy-seven
5
8
11
62
41 31
13 35 35
6
9
12
80
80 32
27 55 38
7
10
13
9
40 30
30 76 81
Solve.
14
Jon has 27 crayons.
Mia has 63 crayons.
Sal has 48 crayons.
Who has the least number?
Math
Reasoning
Jon
___________
Number Sense
MR 2.1
Is the number sentence true? Explain.
15
true
Possible explanation: 16 can be written as 1 ten
and 6 ones.
16 6 10 6 6
page 22
Home Resource and Homework
Chapter 3 Lesson 3
B – © CSL Associates, Inc. All rights reserved.
Compare. Write , , or .
MCX94TEG2Ch01_30.v9.4.1 2/19/01 19:44 Page 59
Name
P RAC T I C E
Write each expression in words.
1
7 14
Seven is less than fourteen.
__________________________________________
2
49 51
Forty-nine is less than fifty-one.
__________________________________________
3
53 48
Fifty-three is more than forty-eight.
__________________________________________
4
91 88
Ninety-one
is more than eighty-eight.
__________________________________________
Compare. Write , , or .
5
8
B – © CSL Associates, Inc. All rights reserved.
11
73
51 41
14 44 39
6
9
12
7
70 42
37 28 28
7
10
13
8
50 60
60 87 91
Solve.
14
Lin has 36 crayons.
Mara has 72 crayons.
Leo has 49 crayons.
Who has the least number of crayons? ___________
Lin
Math
Reasoning
Number Sense
MR 2.1
Is the number sentence true? Explain.
15
true
Possible explanations: You can add numbers in any
order. You can show it with counters.
14 4 4 14
Chapter 3 – Lesson 3
Student Book Page
page 32
Name
P RAC T I C E
Write each expression in words.
1
8 15 _______________________________________________
eight is less than fifteen
2
58 62 _______________________________________________
fifty-eight is less than sixty-two
3
45 39 _______________________________________________
forty-five is more than thirty-nine
4
82 77 _______________________________________________
eighty-two is more than seventy-seven
5
8
11
62
41 31
13 35 35
6
9
12
80
80 32
27 55 38
7
10
13
9
40 30
30 76 81
Solve.
14
Jon has 27 crayons.
Mia has 63 crayons.
Sal has 48 crayons.
Who has the least number?
Math
Reasoning
Jon
___________
Number Sense
MR 2.1
Is the number sentence true? Explain.
15
true
Possible explanation: 16 can be written as 1 ten
and 6 ones.
16 6 10 6 6
page 22
Home Resource and Homework
Chapter 3 Lesson 3
B – © CSL Associates, Inc. All rights reserved.
Compare. Write , , or .