三年级口算题:一位数乘两位数 (1)5 × 24 = (2)7 × 74 = (3)6 × 20 = (4)9 × 71 = (5)11 × 2 = (6)68 × 3 = (7)4 × 89 = (8)49 × 7 = (9)8 × 47 = (10)4 × 46 = (11)5 × 60 = (12)79 × 3 = (13)82 × 4 = (14)1 × 88 = (15)1 × 86 =