## Envision Math 4th Grade Textbook Answer Key Topic 2.8 Subtracting Across Zeros

Subtracting Across Zeros

How do you subtract across zeros?

An airplane flight to Chicago has seats for 300 passengers. The airline sold 278 tickets for the flight. How many seats are still available for the flight?

Guided Practice*

In 1 through 6, subtract.

Question 1.

Question 2.

Question 3.
810 – 638

Question 4.
3,304 – 1,137

Question 5.
1,001 – 868

Question 6.
4,000 – 1,698

Question 7.
How would you check if the answer in the example above is correct?

Question 8.
One passenger flew from New York to Phoenix. The flight was 2,145 miles. Another passenger flew from Boston to Seattle. The flight
was 2,496 miles. How many more miles was the flight to Seattle? In 9 through 28, subtract.

Question 9.

Question 10.

Question 11.

Question 12.

Question 13.

Question 14.

Question 15.

Question 16.

Question 17.
450 – 313

Question 18.
5,025 – 178

Question 19.
406 – 381

Question 20.
6,090 – 5,130

Question 21.
1,001 – 35

Question 22.
900 – 406

Question 23.
504 – 319

Question 24.
10,807 – 4,373

Question 25.
3,000 – 1,047

Question 26.
5,001 – 368

Question 27.
700 – 520

Question 28.
2,700 – 1,699

One Way

Find 300 – 278.
Estimate: 300 – 280 = 20
Regroup hundreds to tens and tens to ones.

There are 22 seats available for the flight.

Another way
Find 300 – 278.
Estimate: 300 – 280 = 20
Think of 300 as 30 tens and 0 ones

There are 22 seats available for the flight.

Problem Solving

Question 29.
Shawn scored 10,830 points playing a video game. Miguel scored 9,645 points. How many more points did Shawn score than Miguel?

Question 30.
Writing to Explain Will the difference between 4,041 and 3,876 be greater or less than 1,000? Explain your answer.

Question 31.
Use the chart on the right. Music City sells CDs. Which of the following tells how many more Hip Hop CDs were sold than Latin CDs in April?

A. 887
B. 897
C. 7,090
D. 13,293

Question 32.
William drove from Atlanta, Georgia, to Portland, Oregon. The round trip was 5,601 miles. He traveled 2,603 miles to get to Portland, Oregon, but he decided to take a different route back. How many miles did he travel to get back to Atlanta?

Question 33.
On Thursday, 10,296 people attended a college basketball home game. The following week, 12,000 people attended an away game. How many more people attended the away game than the home game?