4.5×4-414÷23 |
75×+25× |
(-+)÷ |
(-÷2)÷ |
×(+÷) |
÷[×(2-)]. |
(1)4.5×4-414÷23,
=18-18,
=0;
(2)75×
+25×
,
=(75+25)×
,
=100×
,
=60;
(3)(
-+
)÷
,
=(
-+
)×60,
=
×60-
×60+
×60,
=6-5+4,
=5;
(4)(
-
÷2)÷
,
=(
-
)×
,
=
×
-
×
,
=
-,
=
;
(5)
×(
+
÷
),
=
×(
+
),
=
×
,
=
;
(6)
÷[
×(2-
)],
=
÷[
×
],
=
÷,
=
.
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