Let's solve each problem step by step and verify the answers provided in the answer key.
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1) Adam bought 4.8 lbs of cherry and lime jelly beans for his birthday party. If 2.3 lbs were cherry flavor, how many pounds were lime flavor?
Solution:
Total = Cherry + Lime
So, Lime = Total - Cherry
Lime = 4.8 - 2.3 =
2.5 lbs
✔ Answer: 2.5 (Correct)
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2) George and Robin were comparing the distance they ran over a week. If George ran 10.55 miles and Robin ran 6.8 miles, how far did they run total?
Solution:
Total = George + Robin
= 10.55 + 6.8
= 10.55 + 6.80 =
17.35 miles
✔ Answer: 17.35 (Correct)
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3) A botanist was measuring how tall her plant grew. After two weeks it had grown 15.46 inches. The second week alone it had grown 5.56 inches! How much did it grow the first week?
Solution:
Total growth = First week + Second week
First week = Total - Second week
= 15.46 - 5.56 =
9.9 inches
✔ Answer: 9.9 (Correct)
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4) A computer programmer had two files. The first was 30.66 gigabytes and the second was 48.2 gigabytes. What is the total file size of both?
Solution:
Total = 30.66 + 48.2
= 30.66 + 48.20 =
78.86 GB
✔ Answer: 78.86 (Correct)
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5) Tiffany was checking the weight of a gold nugget and a piece of fool’s gold. Together they weighed 92.5 grams. If the fool’s gold was 23.80 grams, how much did the gold nugget weigh?
Solution:
Gold nugget = Total - Fool's gold
= 92.5 - 23.80 =
68.7 grams
✔ Answer: 68.7 (Correct)
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6) A weatherman was measuring the amount of rain two cities received over a week. City A received 9.46 inches while City B received 6.6 inches. How much rain did they get total?
Solution:
Total = 9.46 + 6.6 = 9.46 + 6.60 =
16.06 inches
✔ Answer: 16.06 (Correct)
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7) Jerry was checking how much power his lights used. His first light by itself used 57.19 amps. When he turned on the second light, together they used 147.59 amps. How many amps did just the second light use?
Solution:
Second light = Total - First light
= 147.59 - 57.19 =
90.4 amps
✔ Answer: 90.4 (Correct)
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8) Mike was training for a marathon. On his first day he ran 3.71 kilometers. On the second day he ran 1.4 kilometers. How far did he run altogether?
Solution:
Total = 3.71 + 1.4 = 3.71 + 1.40 =
5.11 km
✔ Answer: 5.11 (Correct)
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9) Emily downloaded two apps which were 10.45 kb total. If one app was 6.55 kb, how big was the other app?
Solution:
Other app = Total - One app
= 10.45 - 6.55 =
3.9 kb
✔ Answer: 3.9 (Correct)
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10) Paul was weighing the amount of candy he received for Halloween. If he received 5.49 kg and his brother received 9.7 kg, how much candy did they get all together?
Solution:
Total = 5.49 + 9.7 = 5.49 + 9.70 =
15.19 kg
✔ Answer: 15.19 (Correct)
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✔ Final Verification:
All answers in the
Answer Key are
correct and match the solutions above.
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Summary of Answers:
1. 2.5
2. 17.35
3. 9.9
4. 78.86
5. 68.7
6. 16.06
7. 90.4
8. 5.11
9. 3.9
10. 15.19
✔️ All problems solved correctly using
addition and subtraction of decimals, with proper alignment of decimal points and place values.
Let me know if you'd like this turned into a printable worksheet or explained further!
Parent Tip: Review the logic above to help your child master the concept of 6th grade decimal word problems worksheet.
