Standard Algorithm
Base 10 Blocks
Decompose 2 Addends
Adjust Addends
Number Line
100
510+46
556
100

151+21

175
100

258+356

614

100

214+302

516


100

100+145

245

200
431+341
772
200

240+461

701

200

337+243

580

200

404+278

682

200

290+132

422
300

607+194

801

300

456+239

695

300

618+353

971

300

283+309

592


300

471+328

799

400

549+382

931


400

346+294

640

400

289+375

664
400

594+239

833

400

543+432

975

500

826+153

979

500

753+190

943

500

431+355

786

500

273+384

657

500

714+274

988