ONLINE UPDATE 7th and 8th grade Math 01/06/12
Mathematics: Applications and Connections Course 2 © 2001
Lesson 2-1
Comparing and Ordering Decimals
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1. Which symbol makes the following sentence true? 0.384____________0.386
=
A.
B.
<
C.
>
D.
Hint
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2. List the numbers 5.68, 5.682, 5.6 in order from least to greatest.
5.68, 5.682, 5.6
A.
5.6, 5.68, 5.682
B.
5.68, 5.6, 5.682
C.
5.6, 5.682, 5.68
D.
Hint
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3. Choose the greatest number.
3.505
A.
3.5
B.
3.55
C.
Hint
3.05
D.
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Choose the symbol that makes the following sentence true.
4. 7.88 ___ 7.808.
=
A.
B.
>
<
C.
D.
Hint
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5. Put the following numbers in order from least to greatest.
636.02, 636.01978, 636.1, and 63.615
63.615, 636.02, 636.01978, 636.1
A.
636.01978, 636.02, 636.1, 63.615
B.
63.615, 636.1, 636.01978, 636.02
C.
63.615, 636.01978, 636.02, 636.1
D.
Lesson 2-2
Rounding Decimals
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1. Round 3.546 to the nearest whole number.
3.55
A.
3.5
B.
4
C.
Hint
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3
D.
2. Round 26.7 to the nearest ten.
26.7
A.
26
B.
30
C.
27
D.
Hint
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3. Round 0.799 to the nearest tenth.
1
A.
0.7
B.
0.8
C.
0.79
D.
Hint
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4. Round 15.625 to the nearest tenth.
20
A.
15.7
B.
15.63
C.
Hint
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15.6
D.
5. Find the perimeter of the triangle, then round to the nearest tenth.
34.0 units
A.
34.03 units
B.
34.027 units
C.
34.02 units
D.
Estimating with Decimals
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1. Estimate 23.9 × 32.5 by rounding.
800
A.
1,200
B.
900
C.
600
D.
Hint
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2. Estimate 351.62 ÷ 4.9 by rounding.
90
A.
72
B.
70
C.
97
D.
Hint
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3. Estimate 32.5 + 30.6 + 28.8 + 29.5 by clustering.
130
A.
80
B.
120
C.
160
D.
Hint
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4. Estimate 78.3 + 23.1 by rounding.
100
A.
90
B.
101.4
C.
80
D.
Hint
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5. Estimate 68.2 × 33.7.
2000
A.
2100
B.
3000
C.
2298.34
D.
Hint
Multiplying Decimals
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1. What multiplication problem is modeled by the decimal model shown?
0.5 × 0.6
0.05 × 0.06
A.
B.
10 × 10
C.
5×6
D.
Hint
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2. Multiply 0.032 × 2.1.
0.0672
A.
0.064
B.
672
C.
0.672
D.
Hint
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3. Multiply 2.5 × 0.7.
0.14
A.
0.175
B.
175
C.
1.75
D.
Hint
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4. Multiply 0.25 × 7.
175
A.
1.45
B.
1.75
C.
0.175
D.
Hint
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5. Where is the correct place for the decimal point in the product
7.3 × 0.253?
18.469
A.
0.18469
B.
1.8469
C.
0.018469
D.
Lesson 2-5
Powers of Ten
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1. Solve b = 31.2 × 102.
A.
C.
3,120
312
B.
D.
0.312
3.12
Hint
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2. Multiply 2.35 × 0.001.
A.
C.
0.00235
235
B.
D.
0.0235
2,350
Hint
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3. Solve x = 54.2 × 0.01.
A.
C.
Hint
0.542
5.42
B.
D.
5,420
542
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4. Solve w = 2.35 × 0.001
A.
C.
235
B.
0.0235
D.
0.00235
2,350
Hint
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5. A certain bank gives 2% interest on savings accounts, compounded
semiannually. So, every time the bank computes interest, the amount of
money in each savings account is increased by 1%, or 0.01. If you have
$7,489.00 in a savings account right before interest is added, how much will
you have in the account right after interest is added?
A.
C.
$7,414.85
B.
$756.39
D.
$7,563.89
$75638.9
Lesson 2-6
Dividing Decimals
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1. Find 87.85 ÷ 3.5
25.1
A.
0.251
B.
2.51
C.
Hint
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2. Solve x = 0.75 ÷ 0.05.
251
D.
150
A.
0.15
B.
15
C.
1.5
D.
Hint
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3. Find 206.15 ÷ 21.7.
9.5
A.
0.95
B.
950
C.
95
D.
Hint
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4. Find 74 ÷ 3.2.
23.68
A.
23.125
B.
2.368
C.
2.3125
D.
Hint
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5. Solve q = 182.26 ÷ 6.5.
2.804
A.
28.04
B.
11.84
C.
Lesson 2-7
Decimals and Fractions
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118.4
D.
1.
Express 2
as a decimal.
0.75
A.
B.
275
2.75
C.
D.
Hint
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2. Write 0.21111... using bar notation.
A.
B.
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3. Which symbol makes the following sentence true?
22
22.21
>
<
A.
B.
=
C.
D.
Hint
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4.
Express
as a decimal.
5.4444…
A.
54.4444…
B.
0.54444…
7.25
C.
D.
Hint
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5.
Express
as a decimal.
26
A.
2.6
B.
3.6666…
C.
0.26
D.