题目内容
能简算的要简算
|
| (11-1
| (
|
(1)
×[2.4-(
+
)],
=
×[2
-
],
=
×
,
=
;
(2)
×15
-1.25×15
,
=0.25×15
-1.25×15
,
=(0.25-1.25)×15
,
=-1×15
,
=-15
;
(3)(11-1
)÷(1-
×1
),
=
÷(1-
×
),
=
÷(1-
),
=
÷
,
=
×
,
=
;
(4)(
×0.75+
×0.25)÷
,
=[(
×(0.75+0.25)]÷
,
=[(
×1]×
,
=
×
,
=
.
| 4 |
| 9 |
| 1 |
| 5 |
| 1 |
| 8 |
=
| 4 |
| 9 |
| 2 |
| 5 |
| 13 |
| 40 |
=
| 4 |
| 9 |
| 83 |
| 40 |
=
| 83 |
| 90 |
(2)
| 1 |
| 4 |
| 2 |
| 3 |
| 2 |
| 3 |
=0.25×15
| 2 |
| 3 |
| 2 |
| 3 |
=(0.25-1.25)×15
| 2 |
| 3 |
=-1×15
| 2 |
| 3 |
=-15
| 2 |
| 3 |
(3)(11-1
| 1 |
| 5 |
| 2 |
| 5 |
| 1 |
| 2 |
=
| 49 |
| 5 |
| 2 |
| 5 |
| 3 |
| 2 |
=
| 49 |
| 5 |
| 3 |
| 5 |
=
| 49 |
| 5 |
| 2 |
| 5 |
=
| 49 |
| 5 |
| 5 |
| 2 |
=
| 49 |
| 2 |
(4)(
| 3 |
| 4 |
| 3 |
| 4 |
| 6 |
| 7 |
=[(
| 3 |
| 4 |
| 6 |
| 7 |
=[(
| 3 |
| 4 |
| 7 |
| 6 |
=
| 3 |
| 4 |
| 7 |
| 6 |
=
| 7 |
| 8 |
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