Question

填空:3()()()x9()=2()()()1+30()170=33()()()1

3()()()
* 9()
----------------
2()()()1
30()17
----------------
33()()()1

Answer 1

3413*97 ＝ 331061.
(1).设3abc * 9d = 2()()()1
c*d = ?1
c*9 = ?7
3 * 9 ＝ 27,所以c = 3 , 得3*d =?1,所以d = 7
(2). b*9 + 2= ?1 //2是3*9得到的进位
所以b = 1
(3). 3*9 + 3 = 30, 所以 a*9 = 3?,所以a = 4

所以a = 4, b = 1, c = 3, d =7,
3413*97 = 331061

Answer 2

3413*97 ＝ 331061.
(1).设3abc * 9d = 2()()()1
c*d = ?1
c*9 = ?7
3 * 9 ＝ 27,所以c = 3 , 得3*d =?1,所以d = 7
(2). b*9 + 2= ?1 //2是3*9得到的进位
所以b = 1
(3). 3*9 + 3 = 30, 所以 a*9 = 3?,所以a = 4

所以a = 4, b = 1, c = 3, d =7,
3413*97 = 331061