怎样简便就怎样算14+34×33×(215+112)-1424×(38+13+512)917÷7+17×8172627×28(512-37)-(47-712)-数学

17×
8
17

=(
9
17
+
8
17
)×
1
7

=1×
1
7

=
1
7


(5)
26
27
×28,
=
26
27
×(27+1),
=
26
27
×27+
26
27
×1,
=26+
26
27

=26
26
27


(6)(
5
12
-
3
7
)-(
4
7
-
7
12
),
=
5
12
-
3
7
-
4
7
+
7
12

=(
5
12
+
7
12
)-(
3
7
+
4
7
),
=1-1,
=0.
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