Question

и проверку.
522 + 376
689 – 231
345 - 201
987 – 679​

Answer 1

1)522 + 376 = 898

898 - 376 = 522

2)689 - 231 = 458

231 + 458 = 689

3)345 - 201 = 144

201 + 144 = 345

4)987 - 679 = 308

308 + 679 = 987

Answer 2

522+376=898
Проверка
898-376=522

689-231=458
Проверка
458+231=689

345-201=144
Проверка
144+201=345

987-679=308
Проверка
308+679=987