2桁同士の乗算

(1)

 
×
99
＝
5940

(2)

 
×
65
＝
6240

(3)

 
×
64
＝
3776

(4)

 
×
84
＝
3360

(5)

 
×
68
＝
4284

(6)

98
×
 
＝
1372

(7)

 
×
71
＝
4757

(8)

96
×
 
＝
4320

(9)

 
×
86
＝
4300

(10)

 
×
28
＝
1344

(11)

 
×
89
＝
1068

(12)

57
×
 
＝
4161

(13)

21
×
 
＝
1533

(14)

70
×
 
＝
6650

(15)

78
×
 
＝
5148

(16)

91
×
 
＝
2639