7-1    Two Models for Subtraction


1.    A recipe calles for 4 1/3 cups of sugar.  You have 2 2/3.  How much more do you need?  _____________
 

2.    I have $242 in my savings.  A new suit costs $340.  How much more do I need?  ______________
 

3.    Drywall is sold in lengths of 8 feet.  I need a piece to be 6 feet and 10½ inches.
       How much more should I cut off?                                                                                  ______________
 

4.    François Viéte, the "father of Algebra," was born in 1540 and died in 1603.  How
       old was he when he died?  (2 possible answers)                                                            _______________
 

Consider the line with points A, B, C, D, and E.            ___________________________
                                                                                     A      B              C         D         E

5.    AE - AC = _____
 

6.    BD - CD = _____
 

7.    AD - CD = _____
 

8.    AB + BD = _____
 

9.    AC + CE - AD = _____
 

10.    If I assign you problems 16 - 24, how mnay problems would you have to do? (Be careful!)  ________
 

11.    If I assign you problems n to b,  how many problems would you have to do?  ________
 

13.    If the distance from home plate to the fence in a baseball stadium is 310 feet and I hit a ball
        that falls f feet short of knocking a homerun, how far did I hit the ball?
                                                                                                                                                    _____________

 

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