2桁同士の乗算

(1)

 
×
70
＝
1750

(2)

 
×
18
＝
288

(3)

 
×
75
＝
5475

(4)

 
×
47
＝
611

(5)

28
×
 
＝
2100

(6)

71
×
 
＝
6887

(7)

 
×
41
＝
3485

(8)

 
×
56
＝
2800

(9)

 
×
27
＝
1080

(10)

97
×
 
＝
2619

(11)

 
×
92
＝
7636

(12)

67
×
 
＝
3082

(13)

52
×
 
＝
3016

(14)

44
×
 
＝
2728

(15)

 
×
80
＝
2080

(16)

55
×
 
＝
1155