2桁同士の乗算

(1)

28
×
504

(2)

×
32
2848

(3)

81
×
2430

(4)

45
×
3465

(5)

88
×
880

(6)

×
20
1380

(7)

×
98
8232

(8)

67
×
3484

(9)

×
28
2576

(10)

×
14
1134

(11)

×
44
2552

(12)

12
×
516

(13)

×
26
572

(14)

20
×
700

(15)

×
11
638

(16)

×
46
1104