Mental Addition
Quick Draw/Base Ten Representation
Number Line
Standard Form
Expanded Form
100

250 + 100

What is 350?

100

440 + 100

What is 540?

100

230 + 120

What is 350?

100

150 + 130

What is 280?

100

410 + 110

What is 520?

200

32 + 300

What is 332?

200

320 + 150

What is 470?

200

397 + 240 

What is 637?

200

623 + 282

What is 905?

200

253 + 442

What is 695?

300

540 + 210

What is 750?

300

400 + 450

What is 850?

300

333 + 584

What is 917?

300

485 + 392

What is 877?

300

575 + 255

What is 830?

400

120 + 220

What is 340?

400

375 + 290

What is 665?

400

465 + 323

What is 788?

400

185 + 916

What is 1101?

400

286 + 397

What is 683?

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