A/ 75 X 9 + 45 X 9= ( 75 + 45) X 9 = 120 X 9 = 1080B/ 396 X 76 – 107...

Câu 8: a/ 75 x 9 + 45 x 9= ( 75 + 45) x 9 = 120 x 9 = 1080b/ 396 x 76 – 107 x 76 + 81 x 76= ( 396 – 107 + 81 ) x 76 = 28120