Here are the step-by-step solutions for each problem on the worksheet.
1) Registered Voters
*
Step 1: Identify the numbers. There are
29,791 voters and
93 voting centers.
*
Step 2: Round the numbers to make them easier to divide.
* 29,791 is close to
30,000.
* 93 is close to
100.
*
Step 3: Divide the rounded numbers.
* $30,000 \div 100 = 300$.
*
Check: The result is about 300. This matches option C.
2) Football Fans
*
Step 1: Identify the numbers. Last night had
51,033 fans. Tonight has
44,118 fans. We need to find the difference ("less fans").
*
Step 2: Round the numbers to the nearest thousand.
* 51,033 rounds down to
51,000.
* 44,118 rounds down to
44,000.
*
Step 3: Subtract the rounded numbers.
* $51,000 - 44,000 = 7,000$.
*
Check: The difference is about 7,000. This matches option B.
3) Applicants
*
Step 1: Identify the numbers. There are
7,213 applicants. We need to find half ($\frac{1}{2}$).
*
Step 2: Round the number to an even number that is easy to split in half.
* 7,213 is close to
7,000.
*
Step 3: Divide by 2.
* Half of 7,000 is
3,500.
*
Check: If we used 7,200, half would be 3,600. 3,500 is the closest estimate among the choices. This matches option D.
4) Pizza Orders
*
Step 1: Identify the numbers. Largest order:
6,419. Smallest order:
783. Find the difference.
*
Step 2: Round the numbers.
* 6,419 rounds to
6,400 (or just keep it near 6,400).
* 783 is very close to
800.
*
Step 3: Subtract.
* $6,400 - 800 = 5,600$.
*
Check: Let's try rounding 6,419 up to 6,500. $6,500 - 800 = 5,700$. Both 5,600 and 5,700 are options. Let's look closer. 6,419 is closer to 6,400 than 6,500. So 5,600 is the better estimate. This matches option A.
5) Flour Orders
*
Step 1: Identify the numbers. The baker orders
1,182 pounds every month. We need the total for a year (
12 months).
*
Step 2: Round the numbers.
* 1,182 is close to
1,200.
* 12 stays as
12.
*
Step 3: Multiply.
* $1,200 \times 12$.
* Think of it as $12 \times 12 = 144$, then add the two zeros.
* $14,400$.
*
Check: The estimate is 14,400. This matches option C.
Final Answer:
1) C
2) B
3) D
4) A
5) C
Parent Tip: Review the logic above to help your child master the concept of 5th grade math word problems worksheet.
