👤

Efectueaza scaderile si probele acaestora:
871-531=
765-448=
938-689=


Răspuns :

871-531=340
340+531=871
531+340=871
871-350=531

765-448=317
765-317=448
448+317=765
317+448=765

938-689=249
938-249=689
249+689=938
689+249=938
871-531=340 340+531=871
765-448=317 317+448=765
938-689=249 249+689=938