三年级口算题:一位数乘三位数 (1)189 × 6 = (2)8 × 405 = (3)8 × 751 = (4)945 × 6 = (5)520 × 3 = (6)7 × 121 = (7)881 × 5 = (8)261 × 5 = (9)2 × 523 = (10)5 × 460 = (11)6 × 205 = (12)9 × 654 = (13)727 × 7 = (14)564 × 6 = (15)1 × 162 =