2桁同士の乗算

(1)

31
×
 
＝
775

(2)

95
×
 
＝
3135

(3)

74
×
 
＝
4440

(4)

 
×
99
＝
2574

(5)

 
×
47
＝
2538

(6)

70
×
 
＝
5950

(7)

39
×
 
＝
663

(8)

71
×
 
＝
5396

(9)

 
×
46
＝
2944

(10)

57
×
 
＝
2508

(11)

55
×
 
＝
3520

(12)

 
×
25
＝
675

(13)

 
×
19
＝
475

(14)

21
×
 
＝
252

(15)

 
×
98
＝
5684

(16)

18
×
 
＝
900