问题
解答题
计算下面各题. (1)
(2)
(3)15×
|
答案
(1)
×4 7
×21 10 2 5
=
×6 5 2 5
=
;12 25
(2)
×3 5
×152 9
=
×152 15
=2;
(3)15×
×9 10 3 5
=
×27 2 3 5
=
.81 10
计算下面各题. (1)
(2)
(3)15×
|
(1)
×4 7
×21 10 2 5
=
×6 5 2 5
=
;12 25
(2)
×3 5
×152 9
=
×152 15
=2;
(3)15×
×9 10 3 5
=
×27 2 3 5
=
.81 10