Adding and Subtracting Within 1,000

Find the sum of 308 and 92.

Answer explanation

Remember, when adding, Mathematicians match place values and bundle groups of ten to the next highest place value when needed.

Find the difference between 445 and 168.

Answer explanation

Remember, when subtracting, mathematicians may need to unbundle a larger unit to get more of a smaller unit.

435 + 364

• 799

• 71

• 800

• 791

658 - 432

• 1,090

• 226

• 216

• 224

728 + 165

• 641

• 892

• 563

• 893

843 - 561

• 1,404

• 322

• 282

• 324

708 - 329

• 421

• 379

• 1,037

• 389

402 + 368

• 770

• 760

• 670

• 660

178 + 479

• 658

• 650

• 675

• 657

749 - 298

• 551

• 1, 047

• 451

• 461