# Answers to Book 2 Extra Problems

1.    x   = 3

2.       –     =

3.       –     –     =

4.       x     =

5.       x     =

6.     Since you want to make twice as many cookies, you need twice as much sugar:     x   cup  =     cup

7.     Since you want to make three times as many cookies, you need three times the amount of vanilla:      x     teaspoon  =     teaspoon

8.       x     =

9.     First we have to find out what fraction of the m&m’s in the bowl are peanut m&m’s.  This is a subtraction problem because we were told that two-fifths of all the m&m’s are chocolate:  The fraction that are peanut m&m’s must be      –     =   .  The fraction of these m&m’s that are yellow is one-fifth.  So the fraction of all the m&m’s in the bowl that are yellow peanut m&m’s is      x     =

10.    This is another subtraction problem.   The fraction representing all the m&m’s in the bowl is    .  The fraction that is red chocolate is     (the answer to problem 8), and the fraction that is yellow peanut is     (the answer to Problem 9).  The remainder must therefore be:

–     –     =