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a fost răspuns

3×9+5×9= ×(3+ )=9×casuta+casuta×casuta=

Răspuns :

Marcela16
3×9 + 5×9 = 9 ×( 3+5 ) = 9×3 +9×5 = 27 +45 = 72
Chris02Junior

Factor comun 9:

9(3+5) = 9x3 + 9x5 = 27 + 45 = 72.