2桁同士の乗算

(1)

17
×
 
＝
374

(2)

20
×
 
＝
340

(3)

21
×
 
＝
1386

(4)

37
×
 
＝
407

(5)

 
×
96
＝
3648

(6)

79
×
 
＝
4029

(7)

 
×
94
＝
4324

(8)

 
×
98
＝
7742

(9)

86
×
 
＝
6708

(10)

37
×
 
＝
1480

(11)

 
×
31
＝
1209

(12)

71
×
 
＝
2982

(13)

 
×
76
＝
5016

(14)

80
×
 
＝
4080

(15)

73
×
 
＝
1460

(16)

15
×
 
＝
1320