2桁同士の乗算

(1)

45
×
 
＝
450

(2)

22
×
 
＝
550

(3)

52
×
 
＝
1404

(4)

13
×
 
＝
1170

(5)

 
×
20
＝
760

(6)

17
×
 
＝
510

(7)

16
×
 
＝
256

(8)

 
×
88
＝
7392

(9)

 
×
58
＝
1508

(10)

52
×
 
＝
4992

(11)

65
×
 
＝
910

(12)

 
×
67
＝
4757

(13)

 
×
64
＝
3968

(14)

92
×
 
＝
8188

(15)

66
×
 
＝
5280

(16)

21
×
 
＝
1512