2桁同士の乗算

(1)

15
×
 
＝
870

(2)

 
×
71
＝
4686

(3)

 
×
20
＝
400

(4)

95
×
 
＝
5415

(5)

 
×
87
＝
6351

(6)

94
×
 
＝
5358

(7)

 
×
91
＝
6188

(8)

 
×
82
＝
6560

(9)

 
×
35
＝
490

(10)

 
×
91
＝
5551

(11)

33
×
 
＝
825

(12)

 
×
57
＝
4788

(13)

13
×
 
＝
130

(14)

 
×
52
＝
4108

(15)

 
×
71
＝
4047

(16)

 
×
86
＝
5590