HW 47: Word Problems (Add/Subtract Decimals)
Jerry bought 6.95 lbs of cherry and lime jelly beans for his birthday 
party. If 1.75 lbs were cherry flavor, how many pounds were lime
 flavor? 
SHOW WORK ON YOUR NOTEBOOK! 
Part A. What operation will you use? 
Part B. How many pounds were lime flavor? 
addition
subtraction
pounds
SHOW WORK ON YOUR NOTEBOOK! 
Paige was measuring how much taller she got over two years. 
In the first year she grew 4.62 cm. In the second year she, 
grew 7.7 cm. How much taller did she get altogether? 
Part A. What operation will you use? 
Part B. How much taller did she get altogether?  
addition
subtraction
centimeters
SHOW WORK ON YOUR NOTEBOOK! 
Ned and Sarah were running a relay race. 
The race was 22.01 kilometers total. 
If Ned ran 9.41 kilometers how far did Sarah run? 
Part A. What operation will you use? 
Part B. How far did Sarah run?
addition
subtraction
kilometers
SHOW WORK ON YOUR NOTEBOOK! 
During a science experiment, Mary found the mass of 
two rocks to be 41.4 grams and 74.3 grams. 
What is the total mass of these two rocks? 
Part A. What operation will you use? 
Part B. What is the total mass of these two rocks?  
addition
subtraction
grams
SHOW WORK ON YOUR NOTEBOOK! 
Part A. What operation will you use? 
Part B. How big is the second file? 
A computer programmer had two files with a total size of 93 gigabytes. If one of the files was 50.30 gigabytes, how big is the second file? 
addition
subtraction
gigabytes  
Tom was weighing the amount of candy he received for Halloween. 
If he received 8.30 kg and his brother received 1.8 kg, 
how much candy did they get all together? 
SHOW WORK ON YOUR NOTEBOOK! 
Part A. What operation will you use? 
Part B. How much candy did they get all together?  
addition
subtraction
kilograms
Part B. If Joey's answer was incorrect, what is the correct sum? 

Joey added 56.451 and 8.1369, his answer was 137.82.

Part A. Is he correct or incorrect? Explain how you know.

Joey is correct. He perfectly lined- up the decimal points  and       added up correctly
Joey is incorrect. He didn't pay attention to the place value    of the numbers. 

Mary subtracted 67.1 from 154, her answer was 86.9.

PART A. Is she correct or incorrect? Explain how you know.

PART B. If Mary is right or wrong, write her answer on the box below
Mary is incorrect. Mary didn't pay attantion to the place value
      of the numbers. 
Mary is correct. Mary placed her numbers correctly according
to place value. 
Subtract: 
Without rounding, the answer is 
With rounding to the nearest tenth, the answer is 
With rounding to the nearest hundredth, the answer is  
20.401 - 8.974
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