2桁同士の乗算

(1)

12
×
 
＝
648

(2)

87
×
 
＝
3741

(3)

79
×
 
＝
1501

(4)

70
×
 
＝
2100

(5)

 
×
33
＝
2805

(6)

27
×
 
＝
999

(7)

 
×
81
＝
3078

(8)

 
×
88
＝
2288

(9)

 
×
31
＝
1519

(10)

47
×
 
＝
1786

(11)

11
×
 
＝
231

(12)

51
×
 
＝
2448

(13)

75
×
 
＝
1200

(14)

39
×
 
＝
2769

(15)

 
×
21
＝
1155

(16)

91
×
 
＝
8372