Adding & Subtracting w/ 3-digit Numbers

Addition

100

What is 100+200?

300

200

What is 234+123?

357

300

What is 343+128?

471

400

Using base ten blocks, solve the following problem:
What is 347+138?

485

500

Using a number line, solve:
What is 256+258?

514

Subtraction

100

What is 600-300?

300

200

What is 347-234?

113

300

What is 452-237?

215

400

Using the number algorithm solve:
365-238

127

500

Using a number line, solve:
542-237

305

Mix

100

What is 150+235?

385

200

What is 437-224?

213

300

What is 534-237?

297

400

Use base-ten blocks to solve:
321+323

644

500

Use a number line to solve:
432-327

105