如题所述
第1个回答 2017-04-17
14.5X103
=14.5X100+14.5X3
=1450+43.5
=1493.5
=14.5X100+14.5X3
=1450+43.5
=1493.5
第2个回答 2017-04-17
(1)(
1
7
+
5
14
)÷
5
14
,
=(
1
7
+
5
14
)×
14
5
,
=
1
7
×
14
5
+
5
14
×
14
5
,
=
2
5
+1,
=1
2
5
;
(2)
13
18
×19-
13
18
,
=
13
18
×(19-1),
=
13
18
×18,
=13;本回答被网友采纳
1
7
+
5
14
)÷
5
14
,
=(
1
7
+
5
14
)×
14
5
,
=
1
7
×
14
5
+
5
14
×
14
5
,
=
2
5
+1,
=1
2
5
;
(2)
13
18
×19-
13
18
,
=
13
18
×(19-1),
=
13
18
×18,
=13;本回答被网友采纳