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chapter3.2b
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à 3.2è Adding Decimal Numbers.
äè Please Add the following Decimal Numbers.
â
êë Addêê 3.24
êêêêï41.3
êêêë +ï21.015
#êêêêï──────
êêêêï65.555
éS To add the numbers, 3.24, 41.3, and 21.015, it is first
necessary to write the numbers in a column in such a way that the
decimals are lined up vertically.
êêêêè3.24
êêêêï41.3
êêêë +ï21.015
#êêêêï──────
Next, you should add the columns as you would whole numbers.
êêêêè3.24
êêêêï41.3
êêêë +ï21.015
#êêêêï──────
êêêêï65.555
Note that the decimal point in the sum is written directly below the
other decimal points.
1
êêë Addêè0.37
êêêêï+ï0.79
#êêêêë────
êïA)ï1.16êB)ï2.31ê C)ï2.01ê D)ïå
ü
êêêêë .37
êêêêè+ï.79
#êêêêë────
êêêêë1.16
Ç A
2
êêê Addêè4.68
êêêêè +ï0.72
#êêêêê────
êïA)ï6.36êB)ï4.97ê C)ï5.40ê D)ïå
ü
êêêêê 4.68
êêêêë+ï0.72
#êêêêê─────
êêêêê 5.40
Ç C
3
êêê Addêï2.6392
êêêêè+ï1.42
#êêêêë ──────
êïA)ï4.1432ëB)ï4.0592ë C)ï4.0483ë D)ïå
ü
êêêêè 2.6392
êêêê +ï1.42
#êêêêè ──────
êêêêè 4.0592
Ç B
4
êêëAddè 0.62ï+ï5.23ï+ï12.6
êïA)ï17.85ë B)ï18.35êC)ï18.45êD)ïå
ü
êêêêë.62
êêêêè 5.23
êêêê+ï12.6
#êêêêè──────
êêêêè18.45
Ç C
5
êêë Addè 0.50ï+ï3.99ï+ï28.6
êïA)ï32.99ë B)ï33.09êC)ï31.09êD)ïå
ü
êêêêè 0.50
êêêêè 3.99
êêêê+ï28.6
#êêêêè──────
êêêêè33.09
Ç B
6êêïAddê23.78
êêêêè +è6.495
#êêêêê──────
êïA)ï29.275ëB)ï30.275ëC)ï30.085ë D)ïå
ü
êêêêë23.78
êêêêï+è6.495
#êêêêë──────
êêêêë30.275
Ç B
7
êêè Addë 13.58ï+ï7.239ï+ï2.5
êïA)ï23.319ëB)ï22.309ëC)ï23.429ë D)ïå
ü
êêêêë13.58
êêêêë 7.239
êêêêï+è2.5
#êêêêë──────
êêêêë23.319
Ç A
8
êêê 28.4572êëA)ï39.4452è B)ï40.2352
êë Addê7.5
êêêï2.898
êêë+è0.59êêC)ï38.4452è D)ïå
#êêê ───────
ü
êêêêè28.4572
êêêêè 7.5
êêêêè 2.898
êêêê+è0.59
#êêêêè───────
êêêêè39.4452
Ç A
9
êêê 26.407êë A)ï309.575è B)ï310.565
êë Addê2.89
êêê 42
êêê151.263êë C)ï210.565è D)ïå
êêë+ï88.005
#êêê───────
üêêêè 26.40
êêêêè 2.89
êêêêè42
êêêêï151.263
êêêë +è88.005
#êêêêï───────
êêêêï310.565
Ç B
10
êêê 12êêèA)ï36.4861è B)ï37.6861
êë Addë 19.632
êêë+è6.0541
#êêê ───────êëC)ï38.6761è D)ïå
ü
êêêêè12
êêêêè19.632
êêêê+è6.0541
#êêêêè───────
êêêêè37.6861
Ç B
11èIf Bill spends $55.69 for food, $215.00 for lodging, and
êë $95.26 for gas, what are his total expenditures?
êïA)ï$365.95è B)ï$275.95è C)ï$265.95è D)ïå
ü
êêêêè$ 55.69
êêêêè 215.00
êêêê +è95.26
#êêêêè ──────
êêêêè$365.95
Ç A
12èIf Jane ran 4.1 miles on Monday, 3.8 miles on Wednesday,
êë and 1.9 miles on Friday, what is her total milage?
êïA)ï10.2êB)ï9.8ê C)ï11.8êD)ïå
ü
êêêêë 4.1
êêêêë 3.8
êêêê +è 1.9
#êêêêë ───
êêêêë 9.8
Ç B
13èAdd 2.45 inches, 4.6 inches, 22.5 inches, and 12 inches.
ë A)ï40.65 inëB)ï40.45 inëC)ï41.55 inëD)ïå
üêêêë2.45
êêêêè 4.6
êêêêè22.5
êêêê+ï12
#êêêêè─────
êêêêè41.55 inches
Ç C
14è Rainfall for three consecutive months is 5.38 cm.,
3.4 cm., and 4.69 cm.ïFind the total rainfall for the three months.
ê A)ï13.47 cmè B)ï12.68 cmè C)ï11.47 cmè D)ïå
ü
êêêêë 5.38
êêêêë 3.4
êêêêè+ï4.69
#êêêêë ────
êêêêë13.47 cm
Ç A