2桁同士の乗算

(1)

21
×
 
＝
1281

(2)

 
×
86
＝
6106

(3)

86
×
 
＝
6106

(4)

65
×
 
＝
5460

(5)

46
×
 
＝
3542

(6)

44
×
 
＝
4224

(7)

71
×
 
＝
5538

(8)

 
×
12
＝
1164

(9)

 
×
32
＝
2880

(10)

 
×
30
＝
2310

(11)

 
×
79
＝
1896

(12)

 
×
31
＝
434

(13)

 
×
72
＝
6840

(14)

90
×
 
＝
3420

(15)

 
×
84
＝
6972

(16)

65
×
 
＝
5590