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Gheorghesofia31
a fost răspuns

Exemplu: (54+23)×7= (54+23) ×7
□ × 7 = □ ×7 + □+7
□= □+□
= □


2×(100+55)
87×(2+4) =
9×(518+287)=


Ajutați-mă!!!! Dau coroana

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Răspuns :

Dianageorgiana794

Răspuns:

(54+23)×7=

77×7=535

7×54+7×23=

378+161=

539

____________

2×(100+55)=

2×155=310

2×100+2×55=

200+110=

310

___________

87×(2+4) =

87×6=522

87×2+87×4=

174+348=

522

______________

9×(518+287)=

9×805=7245

9×518+9×287=

4662+2583=

7245

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