【評論主題】2. 計算 27 × 19 + 27 × 11 + 23 × 19 + 23 × 11 的值是多少? (A)1400 (B)1500 (C)2700 (D)2800

【評論內容】

=19X(27+23)+11X(27+23)

=19X50+11X50

=(19+11)X50

=30X50

=1500