NSO.2.4

Look at the base-ten blocks.

 What is the sum of the equation?

• 531

• 540

• 541

• 5311

129 + 268?

 What is the sum of the equation?

• 292

• 294

• 389

• 397

Use the open number line to solve the problem.

438 + 240 = ?

• 568

• 578

• 668

• 678

Use the open number line to solve the problem.

228 + 360 = ?

• 568

• 580

• 488

• 588

Find the value of the expression. Solve any way you choose.

296 + 163 = _______

• 133

• 359

• 459

• 463

Find the sum. Solve any way you choose.

249 + 124 = _______

• 125

• 373

• 363

• 325

Which equations are true? Choose all that apply.

• 303 - 10= 293

• 493 - 100= 393

• 563 - 10= 453

• 309 - 100= 299

Use the place-value blocks to find the value of 864 - 319. 

• 454

• 535

• 545

• 555

The  number line below shows subtraction. 

What is the number being subtracted?

• 132

• 142

• 249

• 391

A student used the model below to show a subtraction problem.  What is the difference? 

• 17

• 23

• 27

• 311