CHAPTER 8

8
Chapter
Dear Family,
My class started Chapter 8 this week. In this chapter, I
will learn how to add and subtract two-digit numbers.
Love,
Vocabulary
Home Activity
ones and tens You can group ones
Using a jar and pennies, work with
your child to add and subtract two-digit
numbers. Start with 11 pennies in the
jar. Have your child add 13 pennies.
Ask your child to explain a way to find
the sum of 11 and 13. Then count with
your child to find how many pennies in
all. Repeat with different quantities each
day. Work with your child to subtract
numbers as well.
to make tens.
© Houghton Mifflin Harcourt Publishing Company
20 ones 5 2 tens
Literature
Reading math stories
reinforces ideas. Look for
these books in a library and
read them with your child.
Chapter 8
Safari Park
One Is a Snail,
by Stuart J. Murphy.
Ten Is a Crab
by April Pulley Sayre. Steck-Vaughn, 2002.
Candlewick, 2006.
one hundred forty-nine
P149
8
Capítulo
Querida familia:
Mi clase comenzó el Capítulo 8 esta semana. En este capítulo,
aprenderé a sumar y restar números de dos dígitos.
Vocabulario
Actividad para la casa
unidades y decenas Puedes agrupar
Con un tarro y centavos, trabaje con su hijo
para sumar y restar números de dos dígitos.
Comience con 11 monedas de 1¢ en el
tarro. Pídale que sume 13 monedas de 1¢.
Pídale que explique cómo encontrar la suma
de 11 y 13. Luego, cuente con su hijo para
saber cuántos centavos hay en total. Repita
con diferentes cantidades cada día. Trabaje
con él para restar números también.
unidades para formar decenas.
20 unidades 5 2 decenas
Literatura
Leer cuentos de matemáticas
refuerza las ideas. Busque estos
libros en la biblioteca y léalos con
su hijo.
P150
one hundred fifty
One Is a Snail,
Ten Is a Crab
Safari Park
por Stuart J. Murphy.
por April Pulley Sayre. Steck-Vaughn, 2002.
Candlewick, 2006.
© Houghton Mifflin Harcourt Publishing Company
Con cariño,
Lesson 8.1
Name
COMMON CORE STANDARD MACC.1.OA.3.6
Add and Subtract within 20
Add and subtract within 20.
© Houghton Mifflin Harcourt Publishing Company
Add or subtract.
1.
6
10
_
2.
7.
7
14
_
8.
13.
6
15
_
14.
11
2
2
_
4
15
_
4.
9
18
_
5.
12
2
3
_
6
17
_
11.
13
2
7
_
17.
3.
8
25
_
9.
10.
12
2
6
_
15.
16.
10
210
_
6.
14
2
9
_
18
2
9
_
12.
15
2
6
_
2
17
_
18.
6
14
_
4
110
_
Solve. Draw or write to explain.
19. Jesse has 4 shells. He finds some
more. Now he has 12 shells. How
many more shells did Jesse find?
— more shells
Chapter 8
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Lesson Check
(MACC.1.OA.3.6)
1. What is the sum?
8155
—
3
12
13
16
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2. What is the difference?
11 2 4 5 —
6
7
9
15
l
l
l
l
Spiral Review
(MACC.1.NBT.2.3)
34
40
42
46
l
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4. Which number is less than 84? (Lesson 7.2)
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94
93
85
69
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© Houghton Mifflin Harcourt Publishing Company
3. Which number is greater than 43? (Lesson 7.1)
HANDS ON
Name
Lesson 8.2
Add Tens
COMMON CORE STANDARD MACC.1.NBT.3.4
Use place value understanding and
properties of operations to add and subtract.
Draw to show tens. Write the sum.
Write how many tens.
1.
10 1 30 5 —
2.
30 1 30 5 —
— tens
3.
60 1 10 5 —
— tens
4.
20 1 20 5
— tens
5.
30 1 20 5 —
— tens
6.
10 1 70 5 —
— tens
© Houghton Mifflin Harcourt Publishing Company
—
Draw tens to solve.
7. Drew makes 20 posters. Tia makes
30 posters. How many posters do
they make?
— tens
— posters
8. Regina read 40 pages. Alice
read 50 pages. How many
pages did they read?
Chapter 8
— pages
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P153
Lesson Check (MACC.1.NBT.3.4)
1. What is the sum?
20 1 30 5 —
60
50
30
10
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2. What is the sum?
30 1 10 5 —
20
30
40
50
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l
Spiral Review (MACC.1.OA.3.6, MACC.1.NBT.2.3)
31356
41458
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4. Which is not true?
5 1 5 5 10
(Lesson 3.5)
7 1 7 5 14
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(Lesson 7.3)
35 . 30
35 , 30
30 , 35
37 . 36
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© Houghton Mifflin Harcourt Publishing Company
3. Which doubles fact helps you solve 6 1 5 5 11?
HANDS ON
Name
Lesson 8.3
Subtract Tens
COMMON CORE STANDARD MACC.1.NBT.3.6
Use place value understanding and
properties of operations to add and subtract.
Draw to show tens. Write the
difference. Write how many tens.
1.
40 2 10 5 —
2.
— tens
3.
50 2 30 5 —
— tens
80 2 40 5 —
— tens
4.
60 2 30 5 —
— tens
© Houghton Mifflin Harcourt Publishing Company
Draw tens to solve.
5. Mario has 70 baseball cards.
He gives 30 to Lisa.
How many baseball cards
does Mario have left?
— baseball cards
Chapter 8
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Lesson Check (MACC.1.NBT.3.6)
1. What is the difference?
60 2 20 5 —
80
50
40
20
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2. What is the difference?
70 2 30 5 —
30
40
50
70
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l
Spiral Review (MACC.1.OA.3.6, MACC.1.NBT.2.3)
3. What is the sum? (Lesson 3.8)
9
14
_
4
5
6
13
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less than 33 and greater than 38.
What numbers are left? (Lesson 7.4)
30 and 32
32 and 36
36 and 37
37 and 39
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© Houghton Mifflin Harcourt Publishing Company
4. Bo crosses out the numbers that are
Lesson 8.4
Name
COMMON CORE STANDARD MACC.1.NBT.3.4
Use a Hundred Chart to Add
Use place value understanding and
properties of operations to add and subtract.
Use the hundred chart to add.
Count on by ones or tens.
1.
47 1 2 5 —
2.
26 1 50 5 —
3.
22 1 5 5 —
4.
40 1 41 5 —
© Houghton Mifflin Harcourt Publishing Company
5.
4 1 85 5 —
Choose a way to solve. Draw or write to show your work.
6. 17 children are on the bus.
Then 20 more children get on
the bus. How many children
are on the bus now?
— children
Chapter 8
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Lesson Check (MACC.1.NBT.3.4)
1. What is 42 + 50?
47
82
l
l
92
97
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l
2. What is 11 + 8?
19
81
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l
91
99
l
l
Spiral Review (MACC.1.OA.4.8, MACC.1.NBT.3.5)
50
48
42
41
l
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l
4. Which addition fact helps
you solve 16 2 9? (Lesson 5.6)
6 1 9 5 15
l
8 1 8 5 16
l
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9 1 7 5 16
l
9 1 9 5 18
l
© Houghton Mifflin Harcourt Publishing Company
3. What number is ten less than 52? (Lesson 7.5)
HANDS ON
Name
Lesson 8.5
Use Models to Add
COMMON CORE STANDARD MACC.1.NBT.3.4
Use place value understanding and
properties of operations to add and subtract.
© Houghton Mifflin Harcourt Publishing Company
Use
and your MathBoard.
Add the ones or tens. Write the sum.
1.
44 1 5 5 —
2.
16 1 70 5 —
3.
78 1 20 5 —
4.
52 1 7 5 —
5.
2 1 13 5 —
6.
73 1 4 5 —
7.
84 1 3 5 —
8.
20 1 25 5 —
9.
49 1 30 5 —
10.
81 1 8 5 —
Solve. Draw or write to explain.
11. Maria has 21 marbles.
She buys a bag of 20 marbles.
How many marbles does
Maria have now?
— marbles
Chapter 8
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Lesson Check (MACC.1.NBT.3.4)
1. What is the sum?
62 1 30 5 —
11
32
59
92
l
l
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l
2. What is the sum?
37 1 2 5 —
49
47
39
25
l
l
l
l
Spiral Review (MACC.1.OA.3.6, MACC.1.NBT.1.1)
(Lesson 5.8)
15 1 0
15 2 6
618
41313
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4. What number does the model show?
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(Lesson 6.9)
104
103
102
101
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© Houghton Mifflin Harcourt Publishing Company
3. Which way makes 15?
HANDS ON
Name
Lesson 8.6
Make Ten to Add
COMMON CORE STANDARD MACC.1.NBT.3.4
Use place value understanding and
properties of operations to add and subtract.
© Houghton Mifflin Harcourt Publishing Company
. Draw to show how
Use
you make a ten. Find the sum.
1.
26 1 5 5 —
2.
68 1 4 5 —
3.
35 1 8 5 —
Choose a way to solve. Draw or
write to show your work.
4. Debbie has 27 markers. Sal
has 9 markers. How many
markers do they have?
— markers
Chapter 8
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Lesson Check (MACC.1.NBT.3.4)
1. What is 47 + 6?
53
54
56
57
l
l
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l
91
92
94
96
l
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2. What is 84 + 8?
Spiral Review (MACC.1.OA.4.7, MACC.1.NBT.1.1)
3. What number does the
100
104
114
140
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4. Which makes the sentence true? (Lesson 5.9)
5 1 4 5 10 2
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1
3
4
5
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© Houghton Mifflin Harcourt Publishing Company
model show? (Lesson 6.10)
HANDS ON
Name
Lesson 8.7
Use Place Value to Add
COMMON CORE STANDARD MACC.1.NBT.3.4
Use place value understanding and
properties of operations to add and subtract.
Draw a quick picture. Use
tens and ones to add.
1.
31
1 26
_
3 tens 1 1 one
2 tens 1 6 ones
— tens
—
2.
54
1 34
_
31
1 26
_
1 — ones
1— 5—
5 tens 1 4 ones
54
1 34
_
3 tens 1 4 ones
— tens
—
1 — ones
1— 5—
3. Write two addition sentences you can use
© Houghton Mifflin Harcourt Publishing Company
to find the sum. Then solve.
Addend
Addend
—1—5 —
—1—5 —
Chapter 8
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Lesson Check (MACC.1.NBT.3.4)
1. What is the sum?
42
1 31
_
11
13
73
74
l
l
l
l
2. What is the sum?
23
1 12
_
11
25
32
35
l
l
l
l
Spiral Review (MACC.1.OA.3.6, MACC.1.NBT.2.2)
3. What number is the same as 2 tens 8 ones? (Lesson 6.6)
82
28
10
8
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5
15
_
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9
10
11
12
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© Houghton Mifflin Harcourt Publishing Company
4. What is the sum? (Lesson 3.3)
Name
/PM@JCK2MJTGLEü BBGRGML6MPB
Problems
PROBLEM SOLVING
Lesson 8.8
COMMON CORE STANDARD MACC.1.NBT.3.4
Use place value understanding and
properties of operations to add and subtract.
Draw and write to solve. Explain
your reasoning.
1. Dale saved 19 pennies. Then he
found 5 more pennies. How many
pennies does Dale have now?
— pennies
2. Jean has 10 fish. She gets
4 more fish. How many fish
does she have now?
— fish
3. Courtney buys 2 bags of apples.
© Houghton Mifflin Harcourt Publishing Company
Each bag has 20 apples. How
many apples does she buy?
— apples
4. John bakes 18 blueberry muffins and
12 banana muffins for the bake sale.
How many muffins does he bake?
— muffins
Chapter 8
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Lesson Check
(MACC.1.NBT.3.4)
1. Amy has 9 books about dogs.
She has 13 books about cats.
How many books does she
have about dogs and cats?
20
22
23
25
l
l
l
l
(MACC.1.OA.2.3, MACC.1.OA.3.6)
2. What is the sum for 4 1 2 1 4?
(Lesson 3.10)
12
11
10
9
l
l
l
l
3. Which shows a way
to make a ten to subtract?
l
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l
(Lesson 4.4)
l
l
© Houghton Mifflin Harcourt Publishing Company
Spiral Review
Lesson 8.9
Name
COMMON CORE STANDARDS MACC.1.NBT.3.4,
MACC.1.NBT.3.6
Practice Addition and Subtraction
Use place value understanding and properties
of operations to add and subtract.
© Houghton Mifflin Harcourt Publishing Company
Add or subtract.
1.
20
1
20
_
2.
90
2
30
_
3.
52
1
4
_
4.
62
1
21
_
5.
39
2
10
_
6.
8
1
2
_
7.
47
1
34
_
8.
4
2
0
_
9.
49
2
6
_
10.
64
1
30
_
11.
63
1
11
_
12.
37
2
6
_
13.
85
1
13
_
14.
48
1
11
_
15.
76
2
15
_
Solve. Write or draw to explain.
16. Andrew read 17 pages of his book
before dinner. He read 9 more pages
after dinner. How many pages did
he read?
—
Chapter 8
pages
one hundred sixty-seven
P167
Lesson Check
(MACC.1.NBT.3.4)
1. Which is the sum of 20 1 18?
40
38
28
2
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2. Which is the difference of 90 2 50?
60
50
40
30
l
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Spiral Review
(MACC.1.OA.1.1, MACC.1.OA.3.6)
3. What number sentence does this
model show? (Lesson 3.7)
10 2 3 5 7
10 1 3 5 13
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4. Mo had some toys. He gave 6 away.
Now he has 6 toys. How many toys
did Mo start with? (Lesson 4.6)
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6
10
12
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© Houghton Mifflin Harcourt Publishing Company
l
COMMON CORE STANDARDS MACC.1.OA.3.6,
MACC.1.NBT.3.4, MACC.1.NBT.3.6
Name
Chapter 8 Extra Practice
Lesson 8.1 (pp. 317 – 320)
Add or subtract.
1.
10 1 3 5
2.
16 2 9 5
Lessons 8.2–8.3 (pp. 321 – 327)
Draw to show tens. Write the sum or
difference. Write how many tens.
1.
30 1 60 5
2.
70 2 20 5
tens
tens
© Houghton Mifflin Harcourt Publishing Company
Lesson 8.4 (pp. 329 – 332)
Use the hundred chart to add.
Count on by ones or tens.
1.
81 1 6 5
2.
3.
75 1 20 5
30 1 42 5
Chapter 8
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Lesson 8.5
(pp. 333 – 336)
Use
and your MathBoard.
Add the ones or tens.
Write the sum.
1.
35 1 30 5
2.
3 1 71 5
3.
44 1 5 5
4.
20 1 11 5
Lessons 8.6–8.7
(pp. 337 – 344)
Write the sum.
1.
56 1 8 5
2.
5 1 27 5
3.
13 1 7 5
4.
33 1 9 5
5.
6 1 64 5
7.
61
1 29
73
1 18
(pp. 349 – 352)
Add or subtract.
1.
16 2 8 5 —
3.
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48
25
4.
one hundred seventy
10
1 80
2.
5.
35 1 53 5 —
79
29
6.
3
23
© Houghton Mifflin Harcourt Publishing Company
Lesson 8.9
6.