Question

efectueaza scaderile ,apoi verifica prin adunare si prin scadere:643-387 ;790-491;832-576;597-398

Answer 1

643-387=256
P. 256+387=643
P. 643-256=387
790-491=299
P. 491+299=790
P. 790-299=491
832-576=256
P. 576+256=832
P. 832-256=576
597-398=199
P. 398+199=597
P. 597-199=398

Answer 2

643-387=256
Proba 1: 387+256=643
Proba 2: 643-256=387

790-491=299
Proba 1: 299+491=790
Proba 2: 790-299=491

832-576=256
Proba 1: 576+256=832
Proba 2: 832-256=576

597-398=199
Proba 1: 398+199=597
Proba 2: 597-199=398

Sper ca te-am ajutat!! :)