PMI 5th Grade, Unit 2 Decimal Computation
Decimal Operations Addition
Classwork Solve the following problems:
1) 65.24 + 72.11 =
4) 34.12 + 0.9 =
2) 8.29 + 0.31 =
5) 0.234 + 0.541 =
3) 159.34 + 2.64 =
6) 6.2 + 0.456 =
7) Use a place value chart to solve. Then, write your answer in standard form.
15 and 2 tenths 9 thousandths + 2 and 3 hundredths 2 thousandths =
8) Estimate the sum of 4.9 + 3.012.
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Homework
Solve the following problems:
9) 6.18 + 67.14 =
12) 87.14 + 8.9 =
10) 10.87 + 5.67 =
13) 64.047 + 0.71 =
11) 98.007 + 6.04 =
14) 0.67 + 3.1 =
15) Use a place value chart to solve. Then, write your answer in standard form.
1 hundred 4 tens and 9 tenths 8 hundredths 7 thousandths + 21 and 4 hundredths 8
thousandths =
16) Estimate the sum of 87.071 + 6.8.
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Decimal Operations Subtraction
Classwork
Solve the following problems:
17) 68.72 – 2.41 =
20) 6 – 0.42 =
18) 54.07 – 4.01 =
21) 5.4 – 3.27 =
19) 846.48 – 32.74 =
22) 15.87 – 5.9 =
23) Use a place value chart to solve. Then, write your answer in standard form.
8 tenths 6 thousandths – 4 hundredths 3 thousandths =
24) Estimate the difference of 6.8 – 0.043.
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Homework
Solve the following problems:
25) 61.8 – 40.4 =
28) 467.408 – 467.386 =
26) 14.09 – 4.07 =
29) 15 – 0.8 =
27) 6.87 – 0.49 =
30) 9 – 0.87 =
31) Use a place value chart to solve. Then, write your answer in standard form.
64 and 8 tenths – 4 and 27 hundredths =
32) Estimate the difference of 64.708 – 62.688.
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Multiplication Review
Classwork
Solve the following problems:
33) 53 x 4 =
36) 4,302 x 6 =
34) 682 x 7 =
37) 5,002 x 4 =
35) 926 x 5 =
38) 73 x 23 =
39) Use an area model to show the product of 65 x 28. Write your answer in standard
form.
40) Estimate the product of 88 and 30 =
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Classwork
Solve the following problems:
41) 67 x 8 =
44) 5,302 x 3=
42) 742 x 5 =
45) 7,811 x 7 =
43) 803 x 6 =
46) 45 x 62 =
47) Use an area model to show the product of 81 x 37. Write your answer in standard
form.
48) Estimate the product of 72 and 40.
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Decimal Operations Multiplication
Classwork
Solve the following problems:
49) 54.24 x 2 =
52) 195.2 x 0.03 =
50) 1.47 x 3 =
53) 67.41 x 4 =
51) 67.4 x 0.04 =
54) 54.6 x 2.3 =
55) Use an area model to show the product of 43.1 x 6. Write your answer in standard
form.
56) Estimate the product of 2.234 x 3.8.
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Homework
Solve the following problems:
57) 87.41 x 3 =
60) 3.478 x 4 =
58) 19.4 x 0.7 =
61) 974.3 x 0.004 =
59) 6.74 x 0.04 =
62) 0.74 x 41 =
63) Use an area model to show the product of 8 x 2.23. Write your answer in standard
form.
64) Estimate the product of 931 x 2.64.
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Real Life Applications
Classwork
65) You purchased $21.87 in groceries at a store. How much change will you get if you
pay with a $50 bill?
66) If an eight foot piece of wood has a length of 2.25 feet cut from it, what is the length
of the piece of wood that is left?
67) At a track meet, the times for four runners in a 100 yard dash are 9.72 sec,10.08
sec, 8.88 sec and 9.5 sec. What is the winning time? Explain your answer.
68) The college student studied for 2.25 hours a day for 4 days. How many hours did
she study during that time?
69) Carpet is on sale for $11.25 a square yard. If you buy 50 square yards, how much
will it cost?
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Homework
70) At a gymnastics competition, Sally scored 8.064 points and Suzy scored 9.654
points. How much higher is Suzy’s score than Sally’s?
71) A diver’s scores at a diving competition were 9.25, 6.85, 8.5 and 9.05. What was his
total score?
72) Frank saved $175.30 in July and $194.75 in August. Then, he bought a bike for
$125.67. How much money did he have left?
73) Two babies were 6.3 lbs and 7.45 lbs. when they were born. What is their combined
weight?
74) A maple tree is 12.4 feet tall. A dogwood tree is 7.2 feet shorter than the maple
tree. What are their combined heights?
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Decimal Computation Unit Review
Multiple Choice Questions
75) 0.35 + 1.72 =
a. 2.07
b. 1.37
c. 0.602
d. 20.7
76) 67.9 + .068 =
a. 67.968
b. 6.7968
c. 679.68
d. 6,796.8
77) 32.1 + 457.1 =
a. 425
b. 89.2
c. 479.2
d. 489.2
78) .07 + .007 =
a. 0.77
b. .077
c. 7.7
d. 0.777
79) 55.5 + 1.355 =
a. 54.145
b. 55
c. 56.855
d. 56.955
80) 367.1 - 23.43 =
a. 353.67
b. 343.77
c. 343.67
d. 353.77
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81) 100 - 42.67 =
a. 58
b. 57.33
c. 57
d. 5.733
82) 19.4 - 0.194=
a. 19
b. 192.06
c. 19.3
d. 19.206
83) 55.5 - 1.355 =
a. 54.145
b. 55
c. 54
d. 54.111
84) 69.4 - .03 =
a. 69.1
b. 69.37
c. 69.7
d. .03
85) 9.67 x 4 =
a. 38.68
b. 3.868
c. 386.8
d. 0.3868
86) 32.89 x 9 =
a. 29,601
b. 29.601
c. 296.01
d. 2,960.1
87) 172.172 x 0.89 =
a. 153
b. 153.23308
c. 15,323,308
d. 153.22333
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88) 5.3 x 5.3 =
a. 280.9
b. 2,809
c. 28.19
d. 28.09
89) .04 x .051 =
a. 204
b. .0204
c. .0024
d. .00204
90) 0.9825 ÷ 0.3 =
a. 3,275
b. 3.275
c. 3
d. 3.384
91)
Michelle pays $20.55 for her dinner and offers to pay John’s dinner bill as well.
If John’s dinner cost $15.78, how much did Michelle spend at dinner time?
a. $40.00
b. $4.77
c. $3.33
d. $36.33
92)
Lou weighed 225 pounds in October. He lost 50 pounds in November, 23.6
pounds in December, and 5.8 pounds in January. How much does Lou now
weigh?
a. 151.4 pounds
b. 195.6 pounds
c. 169.2 pounds
d. 145.6 pounds
93)
It snowed 1.5 inches Monday and 0.79 inches on Tuesday. How much did it snow
after both days?
a. 229 inches
b. 0.71 inches
c. 2.29 inches
d. 22.9 inches
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94)
Juan has $1,000 in the bank. He buys a computer for $500 and a book for $15.
How much money is in his bank account after his shopping trip?
a. $450
b. $485
c. $584
d. $48.5
95)
The store sells oranges for $2.18. If Neil buys 5 oranges, how much money will he
spend?
a. $10.90
b. $109
c. $19
d. $10.09
Short Constructed Response Questions
96) Estimate the product for 56 x 33 _________________________________
97) Estimate the product for 45.4 x 6.3 ________________________________
98) Estimate the product for 99 x 19.8 _________________________________
99) Estimate the product for 10.1 x 6.9 ________________________________
100)
Find the sum of 6.9 + 3.9 + 0.124 __________________________________
101)
Find the sum of 9.764 + 1.334 ____________________________________
102)
Find the sum of 8 + 1.3 + 9.0 + 1.742________________________________
103)
Find the difference of 90.95 - 4.76 __________________________________
104)
Find the difference of 54.22 - 50.22 _________________________________
105)
Find the difference of 0.45 - .001 __________________________________
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Extended Constructed Response Questions
106) a. Write down a number that has a tens, ones, tenths, hundredths and
thousandths place.
b. Add 0.765 to it.
c. Subtract .003 from that answer.
d. Multiply that number by 4.
e. Write out your final number in words.
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107) Three friends are having ice cream together: Rosanna, Jose and Thomas. Use
the ice cream menu shown below to answer the questions.
Sweet Shop Menu
Ice Cream Flavors
Cost
Vanilla
$1.99
Chocolate
$1.50
Strawberry
$1.25
Rocky Road
$2.50
Toppings
Cost
Sprinkles
$0.25
Walnuts
$0.75
Whipped Cream
$0.50
When they put all their cash together, the three friends have a total of $40.00.
They decide that each person will order a cone with one ice cream flavor and one
topping. They agree that each order will costs at least $1.00, but no more than
$3.00.
a. Determine three different cones that the friends could order.
b. After totaling all three amounts, what will their change be?
c. Could they afford to buy their friend Danielle an ice cream cone with a topping
with their change?
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CW-HW Answer Key
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
11)
12)
13)
14)
15)
16)
17)
18)
19)
20)
21)
22)
23)
24)
25)
26)
27)
28)
29)
30)
31)
32)
33)
34)
35)
36)
37)
38)
137.35
8.6
161.98
35.02
0.775
6.656
17.241
8
73.32
16.54
104.047
96.04
64.757
3.77
126.035
94
66.31
50.06
813.74
5.58
2.13
9.97
0.763
7
21.4
10.02
6.38
.022
14.2
8.13
60.53
2
212
4774
4630
25,812
20,008
1,679
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39)
40)
41)
42)
43)
44)
45)
46)
47)
48)
49)
50)
51)
52)
53)
54)
55)
56)
57)
58)
59)
60)
61)
62)
63)
64)
65)
66)
67)
68)
69)
70)
71)
72)
73)
74)
1,820
2,700
536
3,710
4,818
15,906
54,677
2,790
2,997
2,800
108.48
4.41
2.696
5.856
269.64
125.58
258.6
8
262.23
13.58
.2696
13.912
3.8972
276.34
17.84
2,700
$28.13
5.75 feet
8.88 sec
9 hours
$562.50
1.59
33.65
$244.38
13.75 lbs
19.6 feet
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Unit Review Answer
Key
75) a
76) a
77) d
78) b
79) c
80) c
81) b
82) d
83) a
84) b
85) a
86) c
87) b
88) d
89) b
90) b
91) d
92) d
93) c
94) b
95) d
96) 1,800
97) 270
98) 2,000
99) 70
100) 10.924
101) 11.098
102) 20.042
103) 86.19
104) 4
105) 0.449
106) answers will vary
107) answers will vary
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