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Ch. 5 Study Guide
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Chapter 5 Add & Subtract Decimals

  1. Round 49.294 to the hundredths place.

  1. Round 123.456 to the tenths place.
  1. Estimate.   4.92 + 2.16

  1. Find the value.  92.39 + 64.78
  1. Find the value.  8 - 6.92

  1. Identify the addition properties shown below.

(74 + 63) + 35 = 74 + (63 + 35)

3.210 + .075 = .075 + 3.210

                                                                                                                                                                                                               

7.  How can you use the associative property to solve the equation below mentally? Show your work and explain your thinking.

(18 + 14) + 6 = ___  

                                                   

8. Company A has a budget of $23.87 million and Company B has a budget of $14.22 million. What is the difference between the two budgets if each is rounded to the nearest tenth of a million?

 

                                                                                                 

        

 

 

9)  Mrs. Holtmann bought a pair of jeans for $49.99 and a shirt for $23.59.? If she paid with a $100.00 bill, how much change would she get back?                                         

 

 

                                                                                                   

 

 

                                                                                 

10)  The coach recorded how fast his runners ran 1 mile. Quinn ran a mile in 9.26 minutes, Jack ran a mile in 11.64 minutes, and Aidin ran a mile in 10.36 minutes. How much faster did Quinn run than Aidin?

 

 

 

 

 

                                                                                                                                                           

11)  Add using the decimal model. Shade the model to show your answer. Write your answer.

      1.56 + 2.04          

12)  Subtract using the decimal model. Shade the model to show your answer. Write your answer.

           2.72 - 0.9

13) Look at the following model. Circle the expressions that could match the model.

1.13 + .24                        1.2 + 1.70                        0.37 + 1.01

 1.28 + .09                         1 + 0.037                         6.39 - 5.02