四位数乘以一位数
四位数乘以一位数1675 X 5 =3282 X 6 =5517 X 8 =1123 X 4 =6480 X 2 =4342 X 2 =4452 X 3 =4062 X 6 =1651 X 2 =33
四位数乘以一位数