2桁同士の乗算

(1)

72
×
 
＝
3024

(2)

18
×
 
＝
900

(3)

70
×
 
＝
2240

(4)

35
×
 
＝
1575

(5)

 
×
15
＝
1140

(6)

 
×
90
＝
3870

(7)

55
×
 
＝
2915

(8)

46
×
 
＝
4508

(9)

17
×
 
＝
935

(10)

 
×
94
＝
3478

(11)

25
×
 
＝
650

(12)

85
×
 
＝
1530

(13)

49
×
 
＝
1911

(14)

 
×
71
＝
1349

(15)

 
×
60
＝
4680

(16)

 
×
30
＝
1650