题目内容
计算下面各题,能简算的要简算.
| 5×
|
| [1÷(
|
(1)
-(
+
),
=
-
-
,
=1-
,
=
;
(2)5×
×
×
,
=(5×
)×(
×
),
=2×
,
=
;
(3)
÷6+
×
,
=
×
+
×
,
=(
+
)×
,
=1×
,
=
;
(4)[1÷(
-
)]×
,
=(1÷
)×
,
=
×
,
=
.
| 8 |
| 7 |
| 1 |
| 7 |
| 1 |
| 10 |
=
| 8 |
| 7 |
| 1 |
| 7 |
| 1 |
| 10 |
=1-
| 1 |
| 10 |
=
| 9 |
| 10 |
(2)5×
| 1 |
| 3 |
| 2 |
| 5 |
| 3 |
| 10 |
=(5×
| 2 |
| 5 |
| 3 |
| 10 |
| 1 |
| 3 |
=2×
| 1 |
| 10 |
=
| 1 |
| 5 |
(3)
| 4 |
| 7 |
| 3 |
| 7 |
| 1 |
| 6 |
=
| 4 |
| 7 |
| 1 |
| 6 |
| 3 |
| 7 |
| 1 |
| 6 |
=(
| 4 |
| 7 |
| 3 |
| 7 |
| 1 |
| 6 |
=1×
| 1 |
| 6 |
=
| 1 |
| 6 |
(4)[1÷(
| 7 |
| 9 |
| 2 |
| 9 |
| 5 |
| 27 |
=(1÷
| 5 |
| 9 |
| 5 |
| 27 |
=
| 9 |
| 5 |
| 5 |
| 27 |
=
| 1 |
| 3 |
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