We included **HMH Into Math Grade 3 Answer Key PDF** **Module 10 Lesson 5 Choose a Strategy to Add or Subtract **to make students experts in learning maths.

## HMH Into Math Grade 3 Module 10 Lesson 5 Answer Key Choose a Strategy to Add or Subtract

I Can apply strategies I have learned to solve addition and subtraction problems.

**Step It Out**

Question 1.

Kaya uses tiles to make a design.

Write an addition or subtraction problem about the tiles. Choose a strategy to solve your problem.

Answer:

Nery used square tiles and triangle tiles to make a tower? how many tiles she used in all?

Number of square tiles = 502

Number of triangle tiles = 225

let t be the total tiles

t = 502 + 225

t = 727

**Turn and Talk** What strategy did you choose? Explain why you chose that strategy.

Answer:

I have choose squares and triangles

To make a tower I used the both tiles so I choose addition.

Question 2.

How many more trapezoid tiles are there than triangle tiles in Kaya’s kit?

A. Write an equation to mode! the problem.

Answer:

Trapezoid = 483

Triangle = 225

t = 483 – 225

t = 258

I used subtraction equation.

B. Estimate:

Answer:

483 is rounded to 500

225 is rounded to 220

500 – 220= 280

C. Show two ways to solve the problem.

Answer:

First way is estimating

Second way is doing the equation and finding the appropriate answer.

D. How many more trapezoid tiles are there than triangle tiles?

Answer:

280 more trapezoid tiles are there than triangle tiles

**Turn and Talk** What strategies did you choose? Explain why the strategies work for the problem.

Answer:

I have used addition and subtraction strategies to do the problems.

**Check Understanding**

**Estimate. Then find the sum or difference.**

Question 1.

Estimate: _________

Answer:

Explanation:

Put the 8 in ten’s place and carry 13 to the carry row

Put the 4 in hundred’s place and carry 5 to the carry row

the final result of subtraction between given two numbers 638 and 157 using the long subtraction method is 481

Question 2.

Estimate: __________

Answer:

Explanation:

on calculating the numbers 309 and 542, we get the sum value as 851

Question 3.

Estimate: ___________

Answer:

Explanation:

Put the 2 in ten’s place and carry 11 to the carry row

the final result of subtraction between given two numbers 714 and 91 using the long subtraction method is 623

Question 4.

Use the table above. How many square and hexagon tiles are there?

Answer:

154 tiles

Explanation:

square tiles = 502

hexagon tiles = 348

502 – 348 = 154

**On Your Own**

Question 5.

**Attend to Precision** Ramon uses 225 blue and green tile pieces in his mosaic artwork. If 116 of the pieces are blue, how many tile pieces are green? Explain the strategy you used to solve.

Answer:

Explanation:

Ramon uses 225 blue and green tile pieces in his mosaic artwork.

If 116 of the pieces are blue, how many tile pieces are green

225 – 116 = 109

109 tiles are green

Question 6.

The art teacher has 248 crayons. The school buys some more crayons. Now the art teacher has 564 crayons. How many crayons does the school buy?

Answer:

316 crayons that the school buy

Explanation:

The art teacher has 248 crayons.

The school buys some more crayons.

Now the art teacher has 564 crayons.

564 – 248 = 316

Question 7.

**Reason** Circle the problem in which you need to regroup. Choose a strategy to find the sum.

A. 597 + 174

B. 371 + 405

C. 623 + 145

Answer:

Explanation:

371 + 405 = 776

623 + 145 = 768

**Estimate.** **Then find the sum or difference. Circle the problem in which you need to regroup.**

Question 8.

Estimate: __________

Answer:

Explanation:

on calculating the numbers 408 and 591, we get the sum value as 999

Question 9.

Estimate: __________

Answer:

Explanation:

the final result of subtraction between given two numbers 687 and 246 using the long subtraction method is 441

Question 10.

Estimate: _________

Answer:

Explanation:

on calculating the numbers 324 and 119, we get the sum value as 443

Question 11.

**Construct Arguments** A kit has 500 building blocks. Kirk uses 356 blocks to build a house. How many blocks are left? Use mental math to show how your answer is reasonable.

Answer:

350 is rounded to 360

500 – 360 = 140

so, my answer is reasonable.

Explanation:

A kit has 500 building blocks.

Kirk uses 356 blocks to build a house.

500 – 356 = 144

Question 12.

**Reason** Word cloud art uses related words to make an image. Cora makes a word cloud that has 578 letters. Of the letters, 259 are vowels and the rest are consonants. Are there more vowels or consonants in Cora’s word cloud? Explain.

Answer:

so, there are 319 consonants

There 60 more consonants.

Explanation:

Cora makes a word cloud that has 578 letters.

Of the letters, 259 are vowels and the rest are consonants.

578 – 259 = 319

319 – 259 = 60

There 60 more consonants.

Question 13.

Geography The Pecos River starts ¡n New Mexico and flows to the Rio Grande River in Texas. The Yellowstone River flows through Wyoming, Montana, and North Dakota. The Pecos River is 926 miles long. The Yellowstone River is 692 miles long. How many miles longer is the Pecos River than the Yellowstone River?

Answer:

234 miles longer is the Pecos River than the Yellowstone River

Explanation:

The Pecos River is 926 miles long. The Yellowstone River is 692 miles long.

926 – 692 = 234

Question 14.

Circle the problem in which you need to regroup. Choose a strategy to find the difference.

A. 604 – 355

B. 214 – 143

C. 984 – 542

Answer:

Explanation:

A and B has to regroup tens and ones

**Estimate. Then find the sum or difference. Circle the problem in which you need to regroup.**

Question 15.

Estimate: _________

Answer:

Explanation:

Therefore, on calculating the numbers 314 and 255, we get the sum value as 569

Question 16.

Estimate: ________

Answer:

Explanation:

Put the 1 in ten’s place and carry 10 to the carry row

Put the 1 in hundred’s place and carry 4 to the carry row

Therefore, the final result of subtraction between given two numbers 509 and 399 using the long subtraction method is 110

Question 17.

Estimate: _________

Answer:

Explanation:

Therefore, on calculating the numbers 648 and 250, we get the sum value as 898

Question 18.

There are some students in the cafeteria. Then 74 students enter the cafeteria. Now there are 482 students in the cafeteria. How many students were in the cafeteria to start?

Answer:

408 students were in the cafeteria to start

Explanation:

. Then 74 students enter the cafeteria. Now there are 482 students in the cafeteria.

482 – 74 = 408

Put the 8 in one’s place and carry 12 to the carry row

Put the 0 in ten’s place and carry 7 to the carry row