2桁同士の乗算

(1)

78
×
 
＝
5070

(2)

 
×
77
＝
1617

(3)

 
×
72
＝
1800

(4)

30
×
 
＝
750

(5)

54
×
 
＝
1080

(6)

74
×
 
＝
3256

(7)

97
×
 
＝
5335

(8)

 
×
81
＝
2430

(9)

88
×
 
＝
3520

(10)

74
×
 
＝
6512

(11)

 
×
12
＝
756

(12)

55
×
 
＝
5335

(13)

 
×
47
＝
4559

(14)

 
×
36
＝
1764

(15)

12
×
 
＝
540

(16)

79
×
 
＝
5609