All the solutions provided in **McGraw Hill Math Grade 3 Answer Key PDF Chapter 1 Lesson 5 Round to the Nearest Hundred** will give you a clear idea of the concepts.

## McGraw-Hill My Math Grade 3 Answer Key Chapter 1 Lesson 5 Round to the Nearest Hundred

There can be more than one reasonable rounded number.

**Math in My World**

Example 1

A hydroplane is an extremely fast motor boat. In California, a record speed was set of 213 miles per hour. What is the record speed rounded to the nearest ten and rounded to the nearest hundred?

Round to the nearest ten.

Rounded to the nearest ten, the hydroplane’s speed was ___ miles per hour. Round to the nearest hundred.

Round to the nearest hundred, the hydroplane’s speed was ___ miles per hour.

Answer:

Given that,

In California, a record speed was set of 213 miles per hour.

213 rounded to the nearest ten is 210.

In 213 the ones place is less than 5. So, replace the ones place by 0.

213 rounded to the nearest hundred is 200.

In 213 the tens place is less than 50. So, replace the ones place and tens places 0.

Example 2

Olivia placed some jellybeans in a jar. She rounded that number to the nearest hundred. To win the jar of jelly beans, the estimate needed to be guessed. What was the winning number?

Use a place-value chart to round.

- Circle the digit to be rounded.
- Look at the digit to the right of the place being rounded.
- If the digit is less than 5, do not change the circled digit. If the digit is 5 or greater, add 1 to the circled digit.
- Replace all digits after the circled digit with zeros.

So, 1,483 rounded to the nearest hundred is 1,500. The winning number was ____

Answer:

Given that,

The number is 1483.

1,483 rounded to the nearest 100 is 1,500.

In 1,483 the tens place is greater than 50. So, replace the ones place and tens place by 0 and and 1 to the hundreds place.

**Helpful Hint**

Rounded” numbers have 1 or more “round” 0s at the end.

**Guided Practice**

**Round to the nearest hundred**

Question 1.

______

Answer:

Given that,

The number is 622.

622 rounded to the nearest hundred is 600.

In 622 the tens place is less than 50. So, replace the tens place and tens place by 0.

**Talk Math**

Is it possible for a number to be rounded to the nearest ten and to the nearest hundred and result in the same rounded number?

Round to the nearest ten and nearest hundred

Answer:

Yes, it possible for a number to be rounded to the nearest ten and to the nearest hundred and result in the same rounded number. That the number is 97.

97 rounded to the nearest ten is 100.

97 rounded to the nearest hundred is 100.

Question 2.

ten _____ hundred ______

Answer:

Given that,

The number is 265.

265 rounded to the nearest hundred is 300.

In 265 the tens place is greater than 50. So, replace the ones and tens place by 0 and add 1 to the hundreds place.

**Independent Practice**

**Round to the nearest hundred.**

Question 3.

750 ____

Answer:

Given that.

The number is 750.

750 rounded to the nearest hundred is 800.

In 750 the tens place is equal to 50. So, replace the tens and ones place by o and add 1 to the hundreds place.

Question 4.

1,368 ____

Answer:

Given that,

The number is 1,368.

1,368 rounded to the nearest hundred is 1,400.

In 1,368 the tens place is greater than 50, So, replace the ones and tens place by 0 and add 1 to the hundreds place.

Question 5.

618 ____

Answer:

Given that,

The number is 618.

618 rounded to the nearest hundred is 600.

In 618 the tens place is greater than 50. So, replace the tens and ones place by 0.

Question 6.

372 ____

Answer:

Given that,

The number is 372.

372 rounded to the nearest hundred is 400.

In 372 the tens place is greater than 50. So, replace the tens and ones place by 0 and add 1 to the hundreds place.

Question 7.

509 ____

Answer:

Given that,

The number is 509.

509 rounded to the nearest hundred is 500.

In 509 the tens place is less than 50. So, replace the tens and ones place by 0.

Question 8.

1,216 _____

Answer:

Given that,

The number is 1,216.

1,216 rounded to the nearest hundred is 1,200.

In 1,216 the tens place is less than 50. So, replace the tens and ones place by 0.

**Round to the nearest ten and nearest hundred. Cross out the rounded number that does not belong.**

Question 9.

453

450 460 500

Answer:

Given that,

The number is 453.

453 rounded to the nearest ten is 450.

453 rounded to the nearest hundred is 500.

Question 10.

6,333

7,000 6,330 6,300

Answer:

Given that,

The number is 6,333.

6,333 rounded to the nearest ten is 6,330

6,333 rounded to the nearest hundred is 6,300.

Question 11.

5,037

5,000 5,040 5,100

Answer:

Given that,

The number is 5,037.

5,037 rounded to the nearest ten is 5,040.

5,037 rounded to the nearest hundred is 5,000.

Question 12.

4,776

4,700 4,800 4,780

Answer:

Given that,

The number is 4,776.

4,776 rounded to the nearest ten is 4,780.

4,776 rounded to the nearest hundred is 4,800.

**Round each number to the nearest hundred. Circle the row or column in which three rounded numbers are the same.**

Question 13.

Answer:

279 rounded to the nearest hundred is 300.

321 rounded to the nearest hundred is 300.

291 rounded to the nearest hundred is 300.

Question 14.

Answer:

4,723 rounded to the nearest hundred is 5,000.

4,689 rounded to the nearest hundred is 5,000.

4,717 rounded to the nearest hundred is 5,000.

**Circle whether each number is rounded to the nearest ten or hundred.**

Question 15.

557 rounds to 560 ten hundred

Answer:

Given that,

557 is rounds to 560.

557 is rounded to the nearest ten is 560.

Question 16.

415 rounds to 400 ten hundred

Answer:

Given that,

415 rounds to 400.

415 rounded to the nearest hundred is 400.

Question 17.

89 rounds to 1oo ten hundred

Answer:

Given that,

89 rounds to 100.

89 rounded to the nearest hundred is 100.

Question 18.

75 rounds to 80 ten hundred

Answer:

Given that,

75 rounds to 80.

75 rounded to the nearest ten is 80.

**Problem Solving**

Question 19.

A passenger train traveled 687 miles. To the nearest hundred, how many miles did the train travel?

____ miles

Answer:

Given that,

The passenger train traveled is 687 miles.

687 rounded to the nearest hundred is 700.

In 687 the hundreds place is greater than 50. So, replace the tens and ones place by 0 and add 1 to the hundreds place.

Question 20.

**Mathematical PRACTICE 2 Reason** Myron has 179 postcards. He says he has about 200 cards. Did he round the number of cards to the nearest ten or nearest hundred? Explain.

Answer:

Given that,

Myron has 179 postcards.

He says he has about 200 cards.

179 rounded to the nearest hundred is 200.

in 179 the tens place is greater than 50. So, replace the ones and tens place by 0 and add 1 to the hundreds place.

Question 21.

To the nearest hundred, what will the cost be for the third grade to take a trip to the zoo?

Answer:

Given that,

Third Grade Trip to the Zoo is $1,855.

1,855 rounded to the nearest hundred is $1,900.

In 1,855 the tens place is greater than 50. So, replace the tens and ones place by 0 and add 1 to the hundreds place.

**HOT Problems**

Question 22.

**Mathematical PRACTICE 4 Model Math** Mrs. Jones is thinking of a number that when rounded to the nearest hundred is 400. What is the number? Explain.

Answer:

Given that,

The number that when rounded to the nearest hundred is 400.

351 to 399 all numbers rounded to the nearest hundred is 400.

In 351 to 399 the tens place is greater than 50. so, replace the tens and ones place by 0.

Question 23.

**? Building on the Essential Question** Why might you want to round to the nearest hundred rather than the nearest ten?

Answer:

Rounding to the nearest hundred means movement of last two digits in a number. Rounding to the nearest ten means movement of only one last digit. Rounding to the nearest hundred means having last two digits equal to zero.

### McGraw Hill My Math Grade 3 Chapter 1 Lesson 5 My Homework Answer Key

**Practice**

**Round to the nearest hundred.**

Question 1.

688 _____

Answer:

Given that,

The number is 688.

688 rounded to the nearest hundred is 700.

In 688 the tens place is greater than 50. So, replace the ones and tens place by 0 and add 1 to the hundreds place.

Question 2.

4,248 _____

Answer:

Given that,

The number is 4,248.

4,248 rounded to the nearest hundred is 4,200.

In 4,248 the tens place is less than 50. So, replace the ones and tens place by 0.

Question 3.

316 ____

Answer:

Given that,

The number is 316,

316 rounded to the nearest hundred is 300.

In 316 the tens place is less than 50. So, replace the ones and tens place by 0.

Question 4.

2,781 _____

Answer:

Given that,

The number is 2,781.

2,781 rounded to the nearest hundred is 2,800.

In 2,781 the tens place is greater than 50. So, replace the tens place and ones place by 0 and 1 to the hundreds place.

**Use the number line to round to the nearest hundred.**

Question 5.

1,877 ______

Answer:

Given that,

The number is 1,877.

1,877 rounded to the nearest hundred is 1,900.

In 1,877 the tens place is greater than 50. So, replace the ones and tens place by 0 and add 1to the hundreds place.

Question 6.

1,849 ____

Answer:

Given that,

The number is 1,849.

1,849 rounded to the nearest hundred is 1,800.

In 1,849 the tens place is less than 50. So, replace the ones and tens place by 0.

Question 7.

1,829 _____

Answer:

The number is 1,829.

1,829 rounded to the nearest hundred is 1,800.

In 1,829 the tens place is less than 50. So, replace the ones and tens place by 0.

**Round to the nearest ten and nearest hundred.**

Question 8.

ten ____

hundred _____

Answer:

Given that,

The number is 709

709 rounded to the nearest ten is 710.

In 709 the ones place is greater then 5. So, replace the ones place by 0 and 1 to the tens place.

709 rounded to the nearest hundred is 700.

In 709 the tens place is less than 50. So, replace the ones and tens place by 0.

Question 9.

ten ____

hundred _____

Answer:

Given that,

The number is 185.

185 rounded to the nearest ten is 190.

In 185 the ones place is equal to 5. So, replace the ones place by 0 and add 1 to the tens place.

185 rounded to the nearest hundred is 200.

In 185 the tens place is greater than 50. So, replace the ones and tens place by 0 and add 1 to the hundreds place.

**Problem Solving**

Question 10.

**Mathematical PRACTICE 2 Reason** The table shows how many patients three doctors saw last year. To the nearest hundred, which doctor saw about 2,400 patients? Explain.

Answer:

Given that,

Dr. Walters saw the patients is 2,493.

Dr. Santos saw the patients is 3,205.

Dr. Cooper saw the patients is 2,353.

2,493 rounded to the nearest hundred is 2,500.

3,205 rounded to the nearest hundred is 3,200.

2,353 rounded to the nearest hundred is 2,400.

Therefore Dr. Cooper saw about 2,400.

Question 11.

A group of hikers plans to climb Mt. Carmy. To the nearest hundred, about how many feet will they climb to the peak?

Answer:

Given that,

A group of hikers plans to climb by Mt. Carmy is 5,344.

5,344 rounded to the nearest hundred is 5,300.

In 5,344 the tens place is less than 50. So, replace the ones and tens place by 0.

Therefore he climb to the peak is 5,300.

**Test Practice**

Question 12.

Mr. Miles bought a telescope that cost $3,556. To the nearest hundred, how much did the telescope cost?

A. $3,500

B. $3,560

C. $3,600

D. $4,000

Answer:

Given that,

Mr. Miles bought a telescope that cost $3,556.

3,556 rounded to the nearest hundred is $3,600.

In 3,556 the tens place is greater than 50. So, replace the tens and ones place by 0 and add 1to the hundreds place.

Option D is the correct answer.