6.3×7/9等于4.9
直接约分过程如下:
解:6.3×7/9等于( 49/10 ),【即等于4.9】 ∵已知需求出6.3×7/9等于多少 A × B = A * B = C ∴6.3 × 7/9 = (6×10+3)/10 × 7/9 = 63/10 × 7/9 = (7×9)/10 × 7/9 = 49/10 = 4.9 答:6.3×7/9等于49/10,【即等于4.9】