All the solutions provided in **McGraw Hill Math Grade 4 Answer Key PDF Chapter 2 Lesson 2 Addition and Subtraction Patterns**Â will give you a clear idea of the concepts.

## McGraw-Hill My Math Grade 4 Answer Key Chapter 2 Lesson 2 Addition and Subtraction Patterns

**Math in My World**

Example 1

On Friday, 1,323 people saw the new movie at a local theater. On Saturday, 1,000 more people saw the new movie. On Sunday, 100 less people saw the movie than on Saturday. How many people saw the movie each day?

1. Cut 4 strips of paper. Place each strip of paper on each of the columns shown. Cover the numbers.

2. Slide the strips of paper up to show 1 thousand, 3 hundreds, 2 tens, and 3 ones.

3. Slide the paper down one row in the hundreds column to show the number of people who saw the movie on Sunday. Write this number in the place-value chart.

4. Slide the paper down one row in the hundreds column to show the number of people who saw the movie on Sunday. Write this number in the place-value chart.

So, 2,323 people saw the movie on Saturday and 2,423 saw the movie on Sunday.

Example 2

Miss Starcher drew a puzzle on the whiteboard. The puzzle contains a pattern. Solve her puzzle by filling in the two blank boxes.

1. Each number in the first column is 1000 more than the number in the row above it.

So, 79,245 + 1 ,000 = 80,245.

2. Each number in the last column is 10 more than the number in the row above it.

So, 80,525 + 10 = 80,535.

**Check**

Each number in the last row is 100 more than the number before it.

Since 80,245 + 100 = 80,345, the answer in the first column is correct.

**Talk Math**

What do you look for when you look for a number pattern?

Answer: When numbers in a pattern get larger as the sequence continues, they are in an ascending pattern. Ascending patterns often involve multiplication or addition.

When numbers in a pattern get smaller as the sequence continues, they are in a descending pattern. Descending patterns often involve division or subtraction.

Explanation:

For Example, 0, 5, 10 ,15 ,20 ,25 ,30 ,35….. is an Ascending patterns

and 100, 90 ,80 ,70 ,60 ,50 ,40…. is Descending patterns

**Guided Practice**

**Write each number.**

Question 1.

1,000 more than 3,872

Answer: 4,872

Explanation:

more than refers to add ups

So, 3,872 + 1000 = 4,872

Question 2.

10 less than 221

Answer: 211

Explanation:

Less than refers to subtract

So, 221 – 10 = 211

**Complete the table.**

Question 3.

Answer: 1000 more

Explanation:

more than refers to add ups

37,828 + 1000 = 38,828

So, the change will be 1000

Question 4.

Answer: 730,174

Explanation:

Less than refers to subtract

830,174 – 100,000 = 730,174

So, the end will be 730,174

**Complete each number sentence.**

Question 5.

36,525 + ___ = 36,625

Answer: 100 more

Explanation:

more than refers to add ups

So, 36,525 + 100 = 36,625

Question 6.

98,264 – ____ = 88,264

Answer:Â 10,000 less

Explanation:

Less than refers to subtract

So, 98,264 – 10,000 = 88,264

### McGraw Hill My Math Grade 4 Chapter 2 Lesson 2 My Homework Answer Key

**Practice**

**Write each number.**

Question 1.

100 less than 877

____________

Answer: 777

Explanation:

Less than refers to subtract

So, 877 – 100Â = 777

Question 2.

10,000 more than 6,310

____________

Answer:Â 16,310

Explanation:

more than refers to add ups

So, 10,000 + 6,310 = 16,310

Question 3.

10 more than 1,146

____________

Answer:Â Â 1,156

Explanation:

more than refers to add ups

So,1,146 + 10 = 1,156

Question 4.

1,000 less than 9,052

____________

Answer: 8,052

Explanation:

Less than refers to subtract

So, 9,052 – 1,000 = 8,052

Question 5.

1,000 more than 37,542

____________

Answer: 38,542

Explanation:

more than refers to add ups

So, 37,542 + 1,000 = 38,542

Question 6.

10 less than 2,727

____________

Answer:Â 2,717

Explanation:

Less than refers to subtract

So, 2,727 -10 = 2,717

**Complete each number sentence.**

Question 7.

1,100 + ___ = 1,200

Answer: 100

Explanation:

more than refers to add ups

So,

1,100 + 100 = 1,200

Question 8.

40,619 – ___ = 39,619

Answer: 1,000

Explanation:

Less than refers to subtract

So, 40,619 – 1,000 = 39,619

Question 9.

63,088 – ___ = 53,088

Answer:Â 10,000

Explanation:

Less than refers to subtract

So, 63,088 – 10,000 = 53,088

Question 10.

4,514 + ___ = 4,524

Answer:Â 10

Explanation:

more than refers to add ups

So, 4,514 + 10 = 4,524

**Complete each pattern.**

Question 11.

7,213; ______; 7,413; 7513

Answer:Â 7,313

Explanation:

Given pattern is in Ascending pattern

a series that begins with the least or smallest and ends with the greatest or largest

7,213; 7,313 ; 7,413; 7513

Question 12.

32,877; 42,877; 52,877; ____

Answer:Â 62,877

Explanation:

Given pattern is in Ascending pattern

a series that begins with the least or smallest and ends with the greatest or largest

32,877; 42,877; 52,877; 62,877

Question 13.

967, 957, ___, 937

Answer: 947

Explanation:

Given pattern is in Descending pattern

a series that begins with the greatest or largest and ends with the least or smallest.

967, 957, 947 , 937

Question 14.

3222; ____; 3,220; 3,219

Answer:Â 3221

Explanation:

Given pattern is in Descending pattern

a series that begins with the greatest or largest and ends with the least or smallest.

3222; 3221 ; 3,220; 3,219

**Problem Solving**

Question 15.

Cady had 435 marbles. One week she used her allowance to buy more, and she had 445 marbles. The next week, she bought more and had 455 marbles. Circle the correct pattern.

100 more 10 more 10 less 100 less

Answer: 10 more

Explanation:

Given, Cady had 435 marbles. One week she used her allowance to buy more, and she had 445 marbles.

The next week, she bought more and had 455 marbles.

that will be, 435 , 445 , 455 marbles

So, she has 10 more each week

Question 16.

**Mathematical PRACTICE 8 Look for a Pattern** Lito keeps track of books in a warehouse. Every month he updates a chart that shows the number of books in stock. For one title, his chart shows 54,350; 44,350; 34,350. If the pattern continues, what number will Litoâ€™s chart show next month?

Answer: The number will be 24,350 for the chart next month.

Explanation:

Given, For one title, his chart shows 54,350; 44,350; 34,350

It shows a descending pattern with the difference of 10,000

Then, the next number will be 24,350 books

So, The number will be 24,350 for the chart next month.

Question 17.

Angela uses a large pitcher to water her plants. When the pitcher is full, it holds 384 ounces. Angela gives each plant 100 ounces of water. How much water is left in the pitcher after Angela waters two plants?

Answer: 184 ounces ofÂ water is left in the pitcher after Angela watering two plants

Explanation:

Given, When the pitcher is full, it holds 384 ounces.

Angela gives each plant 100 ounces of water.

If she waters a plant then the pitcher hasÂ 384 – 100 = 284 ounces, as to water each plant she gives 100 ounces of water to the plants.

Now, for 2 plants it will be 2000 ounces, thenÂ 384 – 200 = 184 ounces

So, 184 ounces ofÂ water is left in the pitcher after Angela watering two plants

**Test Practice**

Question 18.

Identify the number pattern. 21,344; 20,344; 19,344

A. 10 less

B. 10,000 less

C. 1,000 less

D. 100 less

Answer: C, 1,000 less

Explanation:

The pattern shows a Descending pattern

with a difference of 1,000 less

So, the number pattern is 1,000 less.