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10×3×9-30:3:10+11=7×8 cu verificare

Răspuns :

10×3×9-30:3:10+11=7×8
30×9-10:10+11=7×8
30×9-10:10+11=7×8
270-1+11=7×8
269+11=56
280=56

Cred ca este o greseala undeva sau 280≠56
=30×9-10:10+11=56
=270-1+11=56
269+11=56
280=56
=280:56
=5
Verificare:56×5=280