6th Grade Math Textbook, Progress

2. At the end of one school day, Ms. Dinger had 17 crayons left.
   She remembered giving out 14 crayons in the morning, getting
   back 12 crayons at recess, and giving out 11 crayons after lunch.
   How many crayons did Ms. Dinger have at the start of the day?


3. Jason was given his allowance on Sunday. On Monday he bought
   a book for $2.95. On Tuesday Kurt paid Jason the $3.50 he owed
   him. Jason now has $6.05. How much was his allowance?


4. Lee wrote a 2-digit number. She divided it by 9, added 24,
   and doubled the result. Her final answer was 64.
   What number did Lee write?


5. Rita bought some peaches. She used 3
   
   2
   3
   lb to make peach cobbler.
   Then she used
   
   5
   6
   lb in fruit salad. After her neighbor gave her
   2
   
   1
   2
   lb from her tree, she had 3
   

1

4 
lb. How many pounds of peaches

did she buy?

Think

110 lb 1 
^3

8


lb 1 
^3

8


lb 2 
^1

2


lb 2 
^1

2


lb

Solve. Use the Work Backward strategy.

0 1. After losing 2


1

2 
lb in each of the first 2 weeks

of March and gaining 1


3

8 
lb in each of the next

2 weeks, Ted’s prizewinning piglet weighed

110 lb. How much did his piglet weigh on March 1?

Visualize yourself in the problem as you

reread it. List the facts and the

question.

Facts: 2 
^12 
lb lost each of the first 2 weeks

1 
^38 
lb gained each of the next 2 weeks

110 lb is its final weight.

Question:How much did the piglet weigh on March 1?

Begin with the piglet’s final weight of 110 lb and work

backward. Subtract the pounds it gained and add

the pounds it lost to find its weight on March 1.

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