题目内容

(1)
14
17
×73+
2
17
×14×6(2)12÷
3
4
-
3
4
×
1
12
(3)47
1
45
÷46.
(1)
14
17
×73+
2
17
×14×6,
=
14
17
×73+
2
17
×7×2×6,
=
14
17
×73+
14
17
×12,
=
14
17
×(73+12),
=
14
17
×85,
=70;

(2)12÷
3
4
-
3
4
×
1
12

=16-
1
16

=15
15
16


(3)47
1
45
÷46,
=(46+
46
45
)×
1
46

=46×
1
46
+
46
45
×
1
46

=1+
1
45

=1
1
45
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