2桁同士の乗算

(1)

×
77
5852

(2)

×
63
882

(3)

17
×
1258

(4)

44
×
2904

(5)

17
×
1105

(6)

49
×
3528

(7)

×
88
8360

(8)

26
×
2444

(9)

×
69
2760

(10)

40
×
680

(11)

×
60
1860

(12)

38
×
2280

(13)

×
40
3080

(14)

21
×
483

(15)

25
×
2025

(16)

90
×
3240