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Estimate Decimal Sum and Differences and Review

Total questions: 117

Worksheet time: 2hrs 17mins

Name
Class
Date
1.

Which is the best estimate?

4.97 + 13.02 (Round to the nearest whole)

a)

14

b)

16

c)

18

d)

19

2.

Which is the best estimate?

9.6 - 6.2 (Round to the nearest whole)

a)

16

b)

15

c)

4

d)

3

3.

Which is the best estimate?

5.07 - 2.56 (Round to the nearest whole)

a)

2

b)

3

c)

7

d)

8

4.

Jan’s lunch bill is $5.74. She pays with a $10 bill. About how much change does she receive? (Round to the nearest whole and estimate 10 - 5.74)

a)

$4

b)

$5

c)

$15

d)

$16

5.

Which is the best estimate?

5.82 + 14.03 (Round to the nearest whole)

a)

19

b)

20

c)

21

d)

22

6.

Which is the best estimate?

8.5 - 7.1 (Round to the nearest whole)

a)

1

b)

2

c)

3

d)

4

7.

Which is the best estimate?

9.07 - 3.67 (Round to the nearest whole)

a)

3

b)

4

c)

5

d)

6

8.

Which is the best estimate?

10.47 + 42.5 (Round to the nearest whole)

a)

54

b)

53

c)

52

d)

51

9.

Which is the best estimate?

57.69 - 41.35 (Round to the nearest whole)

a)

16

b)

17

c)

98

d)

99

10.

Ada’s lunch costs $14.32. She hands the cashier $20. About how much change will Ada receive? (Round to the nearest whole and estimate 20 - 14.32)

a)

$4

b)

$5

c)

$6

d)

$7

11.

Which is the best estimate?

11.36 + 52.6 (Round to the nearest whole)

a)

42

b)

63

c)

64

d)

65

12.

Which is the best estimate?

69.58 - 34.26 (Round to the nearest whole)

a)

36

b)

37

c)

103

d)

104

13.

Estimate the sum by rounding each number to the nearest whole number and then adding.


7.114 + 6.122


The sum is approximately

(a)  

14.

Estimate the sum by rounding each number to the nearest whole number and then adding.


6.17 + 4.7


The sum is approximately

(a)  

15.

Estimate the sum by rounding each number to the nearest whole number and then adding.


8.598 + 2.78


The sum is approximately

(a)  

16.

Estimate the sum by rounding each number to the nearest whole number and then adding.


3.78 + 7.249


The sum is approximately

(a)  

17.

Estimate the difference by rounding each number to the nearest whole number and then subtracting.


10.323 − 1.369


The difference is approximately

(a)  

18.

Estimate the difference by rounding each number to the nearest whole number and then subtracting.


7.4 − 3.7


The difference is approximately

(a)  

19.

Estimate the difference by rounding each number to the nearest whole number and then subtracting.


5.104 − 1.972


The difference is approximately

(a)  

20.

Estimate the difference by rounding each number to the nearest whole number and then subtracting.


10.477 − 3.316


The difference is approximately

(a)  

21.

Estimate the difference by rounding each number to the nearest whole number and then subtracting.


7.096 − 4.774


The difference is approximately

(a)  

22.

Estimate the sum by rounding each number to the nearest whole number and then adding.


10.17 + 5.13 + 2.6


The sum is approximately

(a)  

23.

Use Rounding to Estimate
  51.232 − 28.451.232\ -\ 28.4  

a)

23

b)

21

c)

11

d)

14

24.

Use Rounding to Estimate (round to the nearest whole)

$29.38 + $42.75\$29.38\ +\ \$42.75  

a)

72

b)

80

c)

71

d)

73

25.

Which is the best estimate for 5.07−2.565.07 - 2.56 (rounded to the nearest whole number)?

a)

2

b)

3

c)

7

d)

8

26.

Round to the nearest ones and then subtract.

$3.85 - $2.17

a)

$6

b)

$1

c)

$4

d)

$2

27.

Round to the ones and then subtract.

52.85 - 9.09

a)

44

b)

45

c)

43

d)

40

28.

Round to the nearest ones and then add.

19.83 + 9.93

a)

30

b)

31

c)

29

d)

35

29.

Round to the nearest ones and then add.

3.872 + 2.409

a)

5

b)

7

c)

6

d)

4

30.

Round to the nearest ones and then subtract.

9.086 - 2.419

a)

8

b)

7

c)

6

d)

5

31.

Round to the nearest WHOLE number to find the sum: 34.87 + 20.41

a)

55

b)

55.28

c)

54

d)

50

32.

Round to the nearest WHOLE number to find the sum:

44.56 + 14.72

a)

59.28

b)

50

c)

60

d)

58

33.

Round to the nearest TEN to find the sum:

19.36 + 12.88

a)

32.24

b)

31

c)

32

d)

30

34.

Round to the nearest HUNDRED to find the difference:

576.76 - 231.84

a)

200

b)

300

c)

400

d)

344.92

35.

Estimating is finding a value that is CLOSE or APPROXIMATE to the actual value, but it's not exact.

a)

True

b)

False

36.

Roughly, approximately, and about are all clues for knowing when to round or estimate.

a)

True

b)

False

37.

Which is the best estimate?

4.97 + 13.02 (Round to the nearest whole)

a)

14

b)

16

c)

18

d)

19

38.

Which is the best estimate?

9.6 - 6.2 (Round to the nearest whole)

a)

16

b)

15

c)

4

d)

3

39.

Which is the best estimate?

5.07 - 2.56 (Round to the nearest whole)

a)

2

b)

3

c)

7

d)

8

40.

Which is the best estimate?

5.82 + 14.03 (Round to the nearest whole)

a)

19

b)

20

c)

21

d)

22

41.

Which is the best estimate?

9.07 - 3.67 (Round to the nearest whole)

a)

3

b)

4

c)

5

d)

6

42.

Which is the best estimate?

57.69 - 41.35 (Round to the nearest whole)

a)

16

b)

17

c)

98

d)

99

43.
Which answer below has an eight in the hundredths place?
a)
234.87
b)
845.05
c)
159.482
d)
264.278
44.

What place is the underlined digit in? 0.45

a)

Tenths

b)

Hundredths

c)

Thousandths

45.

What is the order the numbers are in after the decimal point?

a)

Tenths, Hundredths, Thousandths

b)

Hundredths, Thousandths, Tenths

c)

Thousandths, Tenths, Hundredths

46.

Which digit is in the tenths place? 0.3561

a)

0

b)

3

c)

5

d)

6

47.
263.709
Which number is in the hundredths place?
a)
2
b)
9
c)
0
d)
7
48.
12.087
Which number is in the thousandths place?
a)
1
b)
0
c)
8
d)
7
49.

What digit sits in the hundredths place:

234.891

a)

2

b)

1

c)

8

d)

9

50.

Three and four hundred nine thousandths

a)

3.409

b)

3409

c)

340900

d)

.3409

51.

How do you say 0.19?

a)

nineteen

b)

nineteen tenths

c)

nineteen hundredths

d)

nineteen thousandths

52.

How do you say 0.09?

a)

nine

b)

nine tenths

c)

nine hundredths

d)

nine thousandths

53.

How do you say 0.621?

a)

six hundred twenty one

b)

six hundred twenty one tenths

c)

six hundred twenty one hundredths

d)

six hundred twenty one thousandths

54.

How do you say 5.392?

a)

five and three hundred ninety two

b)

five and three hundred ninety two tenths

c)

five and three hundred ninety two hundredths

d)

five and three hundred ninety two thousandths

55.

How do you say 5.39?

a)

five and thirty nine

b)

five and thirty nine tenths

c)

five and thirty nine hundredths

d)

five and thirty nine thousandths

56.
In the number 5.381, what digit is in the thousandths place?
a)
5
b)
3
c)
8
d)
1
57.

What is the place value of 9 in 12.09?

a)

tens

b)

hundredths

c)

ones

d)

tenths

58.

What is the value of 7 in 0.227

a)

0.07

b)

0.007

c)

0.227

d)

0.777

59.

263.709

Which digit is in the hundredths place?

a)

2

b)

9

c)

0

d)

7

60.

What digit is in the hundredths place in the number 456.087?

a)

5

b)

4

c)

8

d)

0

61.

What place is the 5 in?


84.5

a)

tenths

b)

hundreth

c)

thousandths

d)

tens

62.

What place is the 6 in?


354.86

a)

thousands

b)

tenths

c)

hundredths

d)

thousandths

63.
Which digit is in the tenths place?
236.4791
a)
3
b)
6
c)
4
d)
7
64.

In 4.25, what is the place value of the 5

a)

Tenths

b)

Hundredths

c)

Hundreds

d)

Thousandths

e)

Thousands

65.

in 3.247, what place value is the 2 in?

a)

Tens

b)

Hundreds

c)

Tenths

d)

Ones

66.
 263.709
Which number is in the hundredths place?
a)

2

b)
9
c)
0
d)
7
67.
 0.7129
Which number is in the tenths place?
a)
9
b)
2
c)
7
d)
1
68.

Identify the value of the 9 in this number.

a)

9

b)

.09

c)

.9

d)

90

69.

Identify the value of the 9 in this number.

a)

9,000

b)

.9

c)

900

d)

90

70.

Identify the value of the 9 in this number.

a)

900

b)

.9

c)

9

d)

.009

71.

Identify the value of the 9 in this number.

a)

90,000

b)

9

c)

90

d)

.009

72.

Identify the value of the 9 in this number.

a)

.09

b)

.9

c)

90

d)

900

73.

What is the place value of the underlined digit?

a)

tenths

b)

hundredths

c)

thousandths

d)

tens

74.

What is the place value of the underlined digit?

a)

thousands

b)

hundredths

c)

thousandths

d)

tens

75.

What is the place value of the underlined digit?

a)

thousands

b)

hundredths

c)

thousandths

d)

hundreds

76.

What is the place value of the underlined digit?

a)

thousands

b)

ones

c)

thousandths

d)

hundreds

77.

Name the place value of the 4 in this number:

0.475

a)

Thousand

b)

Hundreds

c)

Ones

d)

Tenths

e)

Hundredths

78.

Name the place value of the 4 in this number:

0.154

a)

Hundreds

b)

Ones

c)

Tenths

d)

Hundredths

e)

Thousandths

79.

Name the place value of the 4 in this number:

0.341

a)

Hundreds

b)

Ones

c)

Tenths

d)

Hundredths

e)

Thousandths

80.

Name the place value of the 4 in this number:

0.461

a)

Hundreds

b)

Ones

c)

Tenths

d)

Hundredths

e)

Thousandths

81.

Name the place value of the 4 in this number:

489.57

a)

Hundreds

b)

Ones

c)

Tenths

d)

Hundredths

e)

Thousandths

82.

Name the place value of the 4 in this number:

842.98

a)

Ones

b)

Tenths

c)

Hundredths

d)

Thousandths

e)

Tens

83.

Name the place value of the 4 in this number:

4.035

a)

Ones

b)

Tenths

c)

Hundredths

d)

Thousandths

e)

Tens

84.

Name the place value of the 4 in this number:

4,739.92

a)

Ones

b)

Tenths

c)

Thousandths

d)

Tens

e)

Thousands

85.

Name the place value of the 4 in this number:

2,124.5

a)

Ones

b)

Tenths

c)

Thousandths

d)

Tens

e)

Thousands

86.

Name the place value of the 4 in this number:

4.285

a)

Thousand

b)

Hundreds

c)

Ones

d)

Tenths

e)

Hundredths

87.

What is 0.594 rounded to the nearest tenths place?

(a)  

88.

Larry's Labrador Retriever can bring a tennis ball back from the river in 10.589 seconds. Which shows this number rounded to the nearest hundredths place?

a)

10.59

b)

10.58

c)

10.6

d)

10.5

89.

David used 1.521 gallons of paint on his bedroom walls. What is this amount rounded to the tenths place?

a)

1.5

b)

1.6

c)

1.52

d)

1.4

90.
Which of the following is 8.91 when rounded to the nearest hundredth?
a)
8.833
b)
8.912
c)
8.852
d)
8.966
91.
The women's world record for the 100-meter run is 10.49 seconds.  What is 10.49 seconds rounded to the nearest second?
a)
10 seconds
b)
10.4 seconds
c)
10.5 seconds
d)
11 seconds
92.

Round 23.542 to the nearest tenth.

a)

23.5

b)

23.6

c)

23.54

d)

23

93.
Round 72.178 to the nearest hundredth.
a)
72.2
b)
72.18
c)
72
d)
73.18
94.
Round 29.711 to the nearest whole number.
a)
29
b)
28
c)
30
d)
31
95.

Round 1.823 to the nearest whole number.

a)

1

b)

1.8

c)

2

d)

2.8

96.
Which of the following is true?
a)
1.72 rounded to the nearest tenth is 1.7
b)
2.62 rounded to the nearest tenth is 2.7
c)
3.41 rounded to the nearest whole number is 4
d)
10.231 rounded to the nearest hundredth is 10.22
97.
Which of the following is 9.029 rounded to the nearest hundredth?
a)
9.0
b)
9.02
c)
9.03
d)
9.029
98.

Chef Round uses 1.257 kilograms of meat for his famous meatballs. There are four packages at the market. Which amount is closest to 1.257 kilograms?

a)

1.26 kg

b)

1.2 kg

c)

1.3 kg

d)

1.35 kg

99.

The table shows the neck lengths for four giraffes in the Long-Necked Friends Sanctuary. Which two giraffes have necks that are the same length when rounded to the nearest tenth?

a)

Spot and Stretch

b)

Mittens and Spot

c)

Mittens and Stretch

d)

Spot and Zippy

100.

Multi-Step

Janis sells friendship bracelets at a fair. She has three bracelets that are 16.53 cm, 16.755 cm, and 16.55 cm long. She wants to label the lengths to the nearest tenth of a centimeter. In order, how should she label the bracelets?

a)

16.5 cm, 16.76 cm, 16.6 cm

b)

16.6 cm, 16.7 cm, 16.5 cm

c)

16.5 cm, 16.8 cm, 16.6 cm

d)

16.3 cm, 16.5 cm, 16.5 cm

101.

To which place value is the number rounded? 6.706 to 6.71

a)

ones

b)

hundredths

c)

tenths

d)

thousandths

102.

What is Anita’s speed rounded to the nearest hundredth?

(a)  

103.

The speeds of two runners when rounded to the nearest tenth are the same. Which two runners are they?

a)

Luke and Margola

b)

Margola and Anita

c)

Anita and Shateel

d)

Shateel and Luke

104.

To which place value is the number rounded? 8.293 to 8.29

a)

ones

b)

tenths

c)

hundredths

d)

thousandths

105.

To which place value is the number rounded?


0.799 to 0.8

a)

ones

b)

tenths

c)

hundredths

d)

thousandths

106.

Which number is 5.389 rounded to the nearest hundredth?

a)

5.4

b)

5.38

c)

5.39

d)

5.399

107.

Which number is 7.323 rounded to the nearest tenth?

a)

7.3

b)

7.4

c)

7.32

d)

7.33

108.

A baker uses 2.327 kilograms of blueberries for muffins. There are four packages at the fruit market. Which amount is closest to 2.327 kilograms?

a)

2.3 kg

b)

2.42 kg

c)

2.33 kg

d)

2.4 kg

109.

Multi-Step

The chart shows the length of each student’s pencil. Which person has a pencil length that can be rounded up to the nearest tenth of an inch?

a)

Lori

b)

Ping

c)

Jason

d)

Annie

110.
Which of the following is 8.91 when rounded to the nearest hundredth?
a)
8.833
b)
8.912
c)
8.852
d)
8.966
111.
Saadia exercised on a treadmill for 19.55 minutes.  For how many minutes did Saadia exercise, to the nearest tenth?
a)
20 minutes
b)
19.6 minutes
c)
19.5 minutes
d)
19 minutes
112.
Sakarie wanted to leave a $2.59 tip for the server at a restaurant.  Sakarie only had dollar bills in her wallet, so she rounded the $2.59 to the nearest dollar and left that amount as a tip.  How much did Sakarie leave the server for a tip?
a)
$2.00
b)
$2.50
c)
$2.60
d)
$3.00
113.
The women's world record for the 100-meter run is 10.49 seconds.  What is 10.49 seconds rounded to the nearest second?
a)
10 seconds
b)
10.4 seconds
c)
10.5 seconds
d)
11 seconds
114.
A cheetah can reach a top speed of 39.35 miles per hour.  Rhianna said that 39.35 rounds to 40 to the nearest whole number.  Lavar said that 39.35 rounds to 39.3 to the nearest tenth.  Who is correct?
a)
Rhianna only
b)
Lavar only
c)
They are both correct.
d)
Neither is correct.
115.
Round to the nearest whole number.
99.95
a)
99.5
b)
99.6
c)
100
d)
109
116.
Round to the nearest tenth.
310.286
a)
310
b)
310.29
c)
310.3
d)
310.4
117.

Round to the nearest hundredth

2.408

a)

2.40

b)

2.420

c)

2.41

d)

2.5

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