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a fost răspuns

calculeaza in doua moduri \/ 115x8+5= 12+43x7= 15x69-41 paranteza este la 8+5 12+43 69-41

Răspuns :

CosmoteRo
115x(8+5)=115x13=1495
115x8+115x5=920+575=1495

(12+43)x7=55x7=385
12x7+43x7=84+301=385

15x(69-41)=15x28=420
15x69-15x41=1035-615=420
115•(8+5)=115•13=1495
=115•8+115•5= 920+575=1495
(12+43)•7=55•7=385
=7•12+7•43=84+301=385
15•(69-41)=15•28=420
=15•69-15•41=1035-615=420