Addition Problems
Decomposing Addends
Word Problems
Addition Problems
Adding 10 and 100
100

Find the sum. 

132 + 128 = ?

260

100

Decompose by place value to add 154 + 322

100 + 50 + 4

300 + 20 + 2

400+70+6

476

100

245 people went to the high school's talent show on Friday. 110 people went on Saturday. How many total people went to see the talent show? 

355 people

100

125 + 330 = ? 

455

100

410 + 10 = ? 

420

200

Find the sum. 


236 + 204 = ? 

440

200

Decompose both addends 547 + 322 to add.

500 + 40 + 7

300 + 20 + 2

800 + 60 + 9 

869

200

There are 162 boys and 149 girls at the concert. How many boys and girls are at the concert in all? 

311 boys and girls. 

200

Find the sum. 

145 + 145

290

200

562 + 100 = ? 

662

300

Find the sum. 

213 + 187 = ? 

400

300

Decompose by place value to add 349 + 312

300 + 40 + 9 

300 + 10 + 2

600 + 50 + 11

661

300

During the class president election, Mark received 233 votes. Maria received 179 votes. How many total votes were cast for both Mark and Maria? 

412 votes

300

The total number of tens in 154 + 236 is 8. True or False. Explain. 

False, 154+236 = 390. The total number of tens is 9 not 8. 

300

842 + 10 = ?

852

400

Find the sum. 


543 + 208 = ? 


751

400

Decompose by place value to add 407 + 295

400 + 0 + 7

200 + 90 + 5

600 + 90 + 12

600 + 102

702 

400
Haddie and her mom went to Disney World. Each ticket cost $189. How much money did they spend on tickets? 

$189 + $189 = $378

400

398 + 144 = ? 

542

400

899 + 10 = ? 

909

500

Find the sum. 

294 + 159 = ? 

453

500

Decompose by place value to add 572 + 413

500 + 70 + 2

400 + 10 + 3

900 + 80 + 5

985

500

112 cats and 218 dogs were seen this week at Mr. Smith's veterinarian's office. How many total dogs and cats were seen this week?

330 cats and dogs.

500

598 + 287 = ? 

885

500

15 + 100 = ? 

115