2桁同士の乗算

(1)

 
×
12
＝
120

(2)

57
×
 
＝
3078

(3)

 
×
78
＝
4212

(4)

98
×
 
＝
7252

(5)

91
×
 
＝
5278

(6)

 
×
79
＝
2291

(7)

 
×
71
＝
5325

(8)

 
×
10
＝
650

(9)

 
×
48
＝
4560

(10)

 
×
29
＝
870

(11)

73
×
 
＝
6570

(12)

28
×
 
＝
1008

(13)

 
×
31
＝
3007

(14)

 
×
40
＝
680

(15)

43
×
 
＝
1548

(16)

 
×
81
＝
3564