## Envision Math 4th Grade Textbook Answer Key Topic 2.7 Subtracting Whole Numbers

**Subtracting Whole Numbers**

How do you subtract numbers?

Brenda has a total of 221 songs in her computer. Her sister, Susan, has a total of 186 songs in her computer. How many more songs does Brenda have in her computer than Susan?

Choose an Operation Subtract to find how many more songs.

**Guided Practice***

Do You Know How?

In 1 through 4, subtract.

Question 1.

Answer:

Question 2.

Answer:

Question 3.

Answer:

Question 4.

Answer:

Do You Understand?

Question 5.

In the example at the top, why was the 0 in the hundreds place not written in the answer?

Answer:

Question 6.

Brenda would like to have 275 songs on her computer by next year. How many more songs does she need to download?

**Independent Practice**

In 7 through 26, subtract.

Question 7.

Answer:

Question 8.

Answer:

Question 9.

Answer:

Question 10.

Answer:

Question 11.

Answer:

Question 12.

Answer:

Question 13.

Answer:

Question 14.

Answer:

Question 15.

552 – 228

Answer:

Question 16.

3,711 – 1,683

Answer:

Question 17.

217 – 166

Answer:

Question 18.

562 – 199

Answer:

Question 19.

7,475 – 5,130

Answer:

Question 20.

5,831 – 1,156

Answer:

Question 21.

9,385 – 720

Answer:

Question 22.

1,111 – 589

Answer:

Question 23.

8,476 – 2,185

Answer:

Question 24.

6,251 – 964

Answer:

Question 25.

7,374 – 1,246

Answer:

Question 26.

8,327 – 3,796

Answer:

Step 1

Find 221 – 186.

Estimate: 220 – 190 = 30

Subtract the ones.

Step 2

Subtract the tens.

Subtract the hundreds.

Step 3

__Operations that undo each other__ are inverse operations. Addition and subtraction have an inverse relationship.

The answer checks.

The answer checks.

**Problem Solving**

Question 27.

A crayon company makes 17,491 green crayons and 15,063 red crayons. How many more green crayons are made than red crayons?

A. 3,463

B. 2,428

C. 10,456

D. 32,554

Answer:

Question 28.

Angela hiked a trail that climbed 526 feet. Raul hiked a trail that climbed 319 feet. How many more feet did Angela climb than Raul?

Answer:

Question 29.

Jermaine and Linda collected aluminum cans for one month. Look at the chart below to see how many aluminum cans each

student collected.

a. Who collected more cans?

b. Find the difference between the number of cans collected.

Answer:

Question 30.

Mount Kilimanjaro is a mountain in Africa. A group of mountain climbers begin their descent from the peak. On Monday, the mountain climbers descended 3,499 feet. On Tuesday, they descended another 5,262 feet. How many feet have the mountain climbers descended?

Answer:

Question 31.

Mike’s team scored 63 points in the first half of a basketball game. His team won the game by a score of 124 to103. How many points did his team score in the second half?

Answer: