2桁同士の乗算

(1)

 
×
70
＝
3500

(2)

 
×
60
＝
2460

(3)

 
×
92
＝
5704

(4)

69
×
 
＝
2208

(5)

85
×
 
＝
8415

(6)

 
×
78
＝
4992

(7)

88
×
 
＝
6688

(8)

 
×
81
＝
3402

(9)

 
×
29
＝
1740

(10)

65
×
 
＝
5915

(11)

 
×
24
＝
528

(12)

 
×
15
＝
1335

(13)

86
×
 
＝
7310

(14)

 
×
66
＝
5346

(15)

19
×
 
＝
1292

(16)

64
×
 
＝
6080