Answer Key • Lesson 2: Tenths
Student Guide
Homework (SG pp. 462)
1. Jessie measured the height of the cabinet with one meterstick and
6 skinnies. Write T beside the true statements and F beside the false
statements.
A.
B.
C.
D.
E.
F.
The cabinet is taller than 1 meter but shorter than 2 meters.
The cabinet is shorter than 1 meter.
The cabinet is 16 meters tall.
6
meters tall.
The cabinet is 1—
10
The cabinet is 1.6 meters tall.
The cabinet is .16 meters tall.
2. A. Jacob placed 6 skinnies along the edge of a meterstick. The length
of 6 skinnies is what fraction of a meter?
B. Write this fraction as both a decimal fraction and a common fraction.
3. A. Jessie measured the length of a table in her classroom using skinnies.
She found the length of the table was 18 skinnies. How many whole
meters and how many more tenths does this represent?
B. Write the length of the table in more than one way.
4. A. Locate 1.6 meters, 0.6 meters, and 1.8 meters on the metersticks.
20
30
40
50
60
70
80
90
1M
10
20
30
40
50
60
70
80
90
1M
B. Write the measurements in order from smallest to largest.
5. A. What number is two tenths smaller than 1.8?
B. What number is two tenths larger than 2.0?
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10
Questions 1–5
1. A. T
B. F
C. F
D. T
E. T
F. F
2. A. six-tenths of a meter
B. 0.6 m, 160 m
3. A. one whole meter and 8 tenths
B. 1.8 m, 1180 m, or 1180 m
4. A.
0.6m
50
462
SG • Grade 4 • Unit 10 • Lesson 2
Tenths Helper
1M
10
20
30
40
50
60
70
80
90
1M
TG • Grade 4 • Unit 10 • Lesson 2 • Answer Key
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403
Student Activity Book - Page 403
1
90
Tenths Helper (SAB p. 403)
See Question 20 in the Student Guide Answer Key.
Copyright © Kendall Hunt Publishing Company
Place whole skinnies on this chart to find how many tenths are in one whole
and two wholes. Skip count by tenths.
SAB • Grade 4 • Unit 10 • Lesson 2
80
Student Activity Book
Date
Tenths
70
1.8m
B. 0.6 m, 1.6 m, 1.8 m
5. A. 1.6
B. 2.2
Tenths
Student Guide - Page 462
Name
60
1.6m
Answer Key • Lesson 2: Tenths
Exploring Tenths (SAB pp. 405–406)
Name
Questions 1–8
1. seven-tenths, 170 , or 0.7
2. A. four wholes
B. 4.6, or 4160 , or 4160
3.
Distance Measured
Common Fraction
A.
1 meterstick and 1 skinny
1—
m
10
B.
2 metersticks and 7 skinnies
2—
m
10
Exploring Tenths
1. Nila built the following number on her Tenths Helper chart:
Decimal Fraction
1
1.1 m
7
2
C. 2 metersticks and 2 skinnies
2—
m
10
D.
3 metersticks and 9 skinnies
—m
310
m
E.
3 metersticks and 1 skinny
3—
m
10
Date
Write this number in more than one way.
2.7 m
2. A. Jackie placed 4 flats on her desk. How many whole units does this
2.2 m
represent?
B. She added 6 skinnies to the 4 flats. What number does 4 flats and
9
3.9 m
1
3.1 m
6 skinnies represent?
3. Jerome measured several distances listed below using metersticks and
base-ten pieces. Fill in the missing information.
m
Base-Ten Shorthand
Common Fraction
Decimal Fraction
12 —
10
9
12.9
B.
4
33 —
10
33.4
C.
6—
10
7
6.7
D.
—
3410
E.
20 —
10
A.
4
34.4
5
20.5
Distance Measured
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4. 1.1 m, 2.2 m, 2.7 m, 3.1 m, 3.9 m
5.
A.
Common Fraction
Decimal Fraction
1 meterstick and 1 skinny
B.
2.7 m
C. 2 metersticks and 2 skinnies
9
—
310
m
D.
E.
3.1 m
4. Put Jerome’s measurements in Question 3 in order from shortest to longest.
Write the measurements as decimal fractions.
Tenths
SAB • Grade 4 • Unit 10 • Lesson 2
405
6.
Number
Tens
Place Value
Ones t
Tenths
Number Sentence
A.
A
12.9
1
t
9
10 + 2 + 0.9 = 12.9
B.
33.4
3
3
t
4
30 + 3 + 0.4 = 33.4
C.
6.7
0
6
t
7
6 + 0.7 = 6.7
D.
34.4
3
4
t
4
30 + 4 + 0.4 = 34.4
E.
20.5
2
0
t
5
20 + 0.5 = 20.5
P
2
Student Activity Book - Page 405
Name
Date
5. Practice making numbers with base-ten pieces. Write them using decimals
and common fractions. Fill in the missing information.
Base-Ten Shorthand
Common Fraction
Decimal Fraction
A.
B.
C.
7. 6.7, 12.9, 20.5, 33.4, 34.4
8.
T
20.5
Tenths
Number Sentence
Number
4
4
— = 71—
70 + 1 + 10
10
A.
12.9
t
2
2
2
60 + 4 + —
= 64 —
10
10
B.
33.4
t
5
5
5
30 + —
= 30 —
10
10
C.
t
0
7
1
t
B.
64.2
6
4
C.
30.5
3
0
D.
3.0
3
E.
6. Complete the place value chart. Use decimal fractions in the number
sentences.
4
71.4
A.
—
34 10
D.
0
3 +—
=3
10
Tens
Place Value
Ones t
Number Sentence
10 + 2 + 0.9 = 12.9
t
t
6
t
7
t
34.4
E.
Tenths
= 71
2
0
t
5
7. Put the numbers in the first column of the chart in Question 6 in order from
smallest to largest. Use decimal fractions.
P
=
8. Complete the place value chart. Use common fractions in the number
= 71
71
sentences.
Number
A.
Place Value
Ones t
71.4
B.
406
Tens
Tenths
4
4
— = 71—
70 + 1 + 10
10
t
6
4
t
C.
30.5
t
D.
3.0
t
Number Sentence
Copyright © Kendall Hunt Publishing Company
Copyright © Kendall Hunt Publishing Company
Number
Place Value
Tens
Ones t
6.7
4
D.
2
SAB • Grade 4 • Unit 10 • Lesson 2
Tenths
Student Activity Book - Page 406
TG • Grade 4 • Unit 10 • Lesson 2 • Answer Key 2
Answer Key • Lesson 2: Tenths
Grace’s Base-Ten Pieces (SAB p. 407)
Name
Date
Questions 1–6
1. 10
2. 0.1
3. 20
Grace’s Base-Ten Pieces
Use base-ten pieces (packs, flats, and skinnies only). A flat is one whole.
1. If a flat is 1, then what number is a pack?
2. If a flat is 1, then what number is a skinny?
Grace has two base-ten pieces. She might have skinnies, flats, or packs. For
example, she might have a skinny and a flat. She might have something else.
3. Find all possible sets of pieces that Grace might have. Use base-ten
shorthand to show each set she might have. Write a number for each set.
11
10.1
2
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4. What is the largest number that Grace could possibly have? Show or tell
how you know.
1.1
5. What is the smallest number that Grace could possibly have? Show or tell
how you know.
0.2
6. Put the numbers that Grace could have in order from smallest to largest.
Tenths
SAB • Grade 4 • Unit 10 • Lesson 2
407
Student Activity Book - Page 407
4. 20; Possible response: Two packs are twenty
flats or twenty wholes. You can’t get any larger
than that with two pieces.
5. 0.2; Possible response: The smallest pieces
Grace has are skinnies or one-tenths. If she has
two pieces, two-tenths is the smallest number.
6. 0.2, 1.1, 2, 10.1, 11, 20
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TG • Grade 4 • Unit 10 • Lesson 2 • Answer Key