题目内容
计算:
(1)(2.5×
)÷(
×0.8)-0.75÷
(2)1
×(2
-
)+
÷
(3)
×4.5+3.75÷16.2×2;
(4)[1-(
+
)×4]÷(
÷
)
(1)(2.5×
| 5 |
| 8 |
| 2 |
| 3 |
| 3 |
| 5 |
(2)1
| 3 |
| 4 |
| 4 |
| 5 |
| 1 |
| 1+2 |
| 1 |
| 3 |
| 1 |
| 1+3 |
(3)
| 1 |
| 4 |
(4)[1-(
| 1 |
| 1+4 |
| 1 |
| 5 |
| 1 |
| 3 |
| 1 |
| 4 |
(1)(2.5×
)÷(
×0.8)-0.75÷
,
=
÷
-0.75÷
,
=
÷
-1.25,
=
-1.25,
=
;
(2)1
×(2
-
)+
÷
,
=1
×
+
÷
,
=
+
,
=
;
(3)
×4.5+3.75÷16.2×2,
=1.125+
×2,
=1.125+
,
=
;
(4)[1-(
+
)×4]÷(
÷
),
=[1-
×4]÷
,
=[1-
]÷
,
=-
÷
,
=-
.
| 5 |
| 8 |
| 2 |
| 3 |
| 3 |
| 5 |
=
| 25 |
| 16 |
| 8 |
| 15 |
| 3 |
| 5 |
=
| 25 |
| 16 |
| 8 |
| 15 |
=
| 375 |
| 128 |
=
| 215 |
| 128 |
(2)1
| 3 |
| 4 |
| 4 |
| 5 |
| 1 |
| 1+2 |
| 1 |
| 3 |
| 1 |
| 1+3 |
=1
| 3 |
| 4 |
| 37 |
| 15 |
| 1 |
| 3 |
| 1 |
| 4 |
=
| 259 |
| 60 |
| 4 |
| 3 |
=
| 339 |
| 60 |
(3)
| 1 |
| 4 |
=1.125+
| 25 |
| 108 |
=1.125+
| 25 |
| 54 |
=
| 343 |
| 216 |
(4)[1-(
| 1 |
| 1+4 |
| 1 |
| 5 |
| 1 |
| 3 |
| 1 |
| 4 |
=[1-
| 2 |
| 5 |
| 4 |
| 3 |
=[1-
| 8 |
| 5 |
| 4 |
| 3 |
=-
| 3 |
| 5 |
| 4 |
| 3 |
=-
| 9 |
| 20 |
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