练习
直接计算 填空 (每空10分，共100分)
(1) 43
×
82=
(2) 79
×
31
=
(3) 52
×
99=
(4) 35
×
45=
(5) 27
×
61
=
(6) 64
×
55=
(7) 85
×
42
=
(8) 57
×
52
=
(9) 38
×
99=
(10) 47
×
63=