## 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. Question 2. Question 3. Question 4. Do You Understand?

Question 5.
In the example at the top, why was the 0 in the hundreds place not written in the 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. Question 8. Question 9. Question 10. Question 11. Question 12. Question 13. Question 14. Question 15.
552 – 228

Question 16.
3,711 – 1,683

Question 17.
217 – 166

Question 18.
562 – 199

Question 19.
7,475 – 5,130

Question 20.
5,831 – 1,156

Question 21.
9,385 – 720

Question 22.
1,111 – 589

Question 23.
8,476 – 2,185

Question 24.
6,251 – 964

Question 25.
7,374 – 1,246

Question 26.
8,327 – 3,796

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. 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

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? 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.  