Teacher/User Name: DEMO Name:__________________________ Practice ProblemsBy Easy Worksheet Period: ________ Date: ____________

### Solve:

1) Bill is finding the product of 9 × 2. Bill says "The answer is 7 because subtraction is the opposite of multiplication and 9 - 2 = 7."
Part A
Identify the incorrect reasoning in Bill's statement.
Part B
Show or explain how Bill can correct the statement. Then find the product when 9 is multiplied 2.

By Easy Worksheet

By Easy Worksheet

By Easy Worksheet

By Easy Worksheet

2) Dr. Deb's class is collecting sports cards for fun to trade with classmates. So far, Dr. Deb's class has collected 700 sports cards.
Julie collected 31 sports cards. Steve collected 83 sports cards.
Part A
What is the total number of sports cards collected by the rest of Dr. Deb's class?
Part B
Dan collected 10 sports cards less than Julie collected. How many less sports cards did Dan collect than Steve?
3) Part A
Julie has 54 dolls in one box and 49 dolls in another. Julie gives away 32 dolls. How many dolls does Julie have left?
Part B
After Julie had collected a total of 275 dolls, Lisa gave Julie 34 dolls. How many dolls did Julie have then?
Part C
The table below shows how many dolls Julie gave away each week for four weeks.
 Week Number of dolls Week 1 23 Week 2 11 Week 3 23 Week 4 20

How many dolls did Julie give away during the four weeks?

By Easy Worksheet

By Easy Worksheet

By Easy Worksheet

By Easy Worksheet

4) The owners of a new store have 401 toy cars to sell.
They sell 110 toy cars the first month.
They sell 110 toy cars the second month.
Part A
Write each of the three numbers above, each rounded ot the nearest 10.
Part B
Use the rounded numbers to estimate how many toy cars the owners have left to sell.

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