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×
| 4 |
| 5 |
| 1 |
| 4 |
| 3 |
| 40 |
(2)1
| 4 |
| 17 |
| 2 |
| 3 |
| 3 |
| 4 |
| 11 |
| 12 |
| 17 |
| 21 |
(3)
| 7 |
| 18 |
| 1 |
| 5 |
(4)[1-(
| 1 |
| 12 |
| 1 |
| 15 |
| 3 |
| 10 |
| 9 |
| 25 |
(1)(2.5×
)÷(
×0.8)-0.75÷
,
=2÷0.2-10,
=10-10,
=0;
(2)1
×(2
-
)+
÷
,
=
×
+
×
,
=(
+
)×
,
=
×
,
=
;
(3)
×4.5+3.75÷16.2×2
,
=1.75+
×
×
,
=1.75+0.5,
=2.25;
(4)[1-(
+
)×4]÷(
÷
),
=[1-
×4]÷
,
=[1-
]÷
,
=
÷
,
=
.
| 4 |
| 5 |
| 1 |
| 4 |
| 3 |
| 40 |
=2÷0.2-10,
=10-10,
=0;
(2)1
| 4 |
| 17 |
| 2 |
| 3 |
| 3 |
| 4 |
| 11 |
| 12 |
| 17 |
| 21 |
=
| 21 |
| 17 |
| 23 |
| 12 |
| 11 |
| 12 |
| 21 |
| 17 |
=(
| 23 |
| 12 |
| 11 |
| 12 |
| 21 |
| 17 |
=
| 34 |
| 12 |
| 21 |
| 17 |
=
| 7 |
| 2 |
(3)
| 7 |
| 18 |
| 1 |
| 5 |
=1.75+
| 15 |
| 4 |
| 2 |
| 33 |
| 11 |
| 5 |
=1.75+0.5,
=2.25;
(4)[1-(
| 1 |
| 12 |
| 1 |
| 15 |
| 3 |
| 10 |
| 9 |
| 25 |
=[1-
| 3 |
| 20 |
| 5 |
| 6 |
=[1-
| 3 |
| 5 |
| 5 |
| 6 |
=
| 2 |
| 5 |
| 5 |
| 6 |
=
| 12 |
| 25 |
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