2桁同士の乗算

(1)

18
×
 
＝
378

(2)

 
×
15
＝
495

(3)

 
×
13
＝
390

(4)

52
×
 
＝
2652

(5)

55
×
 
＝
1155

(6)

99
×
 
＝
1287

(7)

21
×
 
＝
1113

(8)

99
×
 
＝
9603

(9)

89
×
 
＝
8633

(10)

 
×
91
＝
4550

(11)

48
×
 
＝
3600

(12)

 
×
77
＝
6160

(13)

 
×
43
＝
4042

(14)

 
×
55
＝
2145

(15)

 
×
34
＝
1360

(16)

 
×
48
＝
3504