2桁同士の乗算

(1)

 
×
55
＝
4950

(2)

97
×
 
＝
2522

(3)

80
×
 
＝
800

(4)

 
×
81
＝
2106

(5)

 
×
47
＝
564

(6)

 
×
30
＝
1770

(7)

37
×
 
＝
2257

(8)

19
×
 
＝
760

(9)

22
×
 
＝
1826

(10)

 
×
70
＝
3570

(11)

45
×
 
＝
2790

(12)

 
×
50
＝
1150

(13)

 
×
12
＝
504

(14)

 
×
30
＝
2010

(15)

23
×
 
＝
598

(16)

 
×
11
＝
220