2桁同士の乗算

(1)

 
×
17
＝
221

(2)

 
×
24
＝
312

(3)

25
×
 
＝
2025

(4)

25
×
 
＝
1825

(5)

 
×
43
＝
3741

(6)

77
×
 
＝
6468

(7)

 
×
91
＝
1274

(8)

 
×
78
＝
4056

(9)

80
×
 
＝
1120

(10)

 
×
24
＝
456

(11)

 
×
64
＝
4544

(12)

60
×
 
＝
2700

(13)

 
×
10
＝
680

(14)

32
×
 
＝
3136

(15)

46
×
 
＝
3588

(16)

23
×
 
＝
1104