2桁同士の乗算

(1)

 
×
31
＝
2790

(2)

 
×
91
＝
6006

(3)

 
×
90
＝
1980

(4)

94
×
 
＝
1504

(5)

37
×
 
＝
3256

(6)

20
×
 
＝
1580

(7)

 
×
79
＝
4108

(8)

 
×
38
＝
2508

(9)

52
×
 
＝
988

(10)

 
×
38
＝
1102

(11)

 
×
93
＝
7161

(12)

 
×
11
＝
462

(13)

28
×
 
＝
1624

(14)

 
×
61
＝
4575

(15)

 
×
90
＝
5490

(16)

 
×
71
＝
4047