题目内容
下面各题怎样算简便就怎样算
×16-2÷
×(
-
)
[6.85-(0.65+0.7)]÷2.5
(
+
)×7+
.
| 5 |
| 7 |
| 7 |
| 5 |
| 12 |
| 13 |
| 5 |
| 2 |
| 1 |
| 3 |
[6.85-(0.65+0.7)]÷2.5
(
| 3 |
| 7 |
| 3 |
| 5 |
| 4 |
| 5 |
(1)
×16-2÷
,
=
×16-2×
,
=(16-2)×
,
=14×
,
=10;
(2)
×(
-
),
=
×
-
×
,
=
-
,
=2;
(3)[6.85-(0.65+0.7)]÷2.5,
=[6.85-1.35]÷2.5,
=5.5÷2.5,
=2.2;
(4)(
+
)×7+
,
=
×7+
×7+
,
=3+(
+
),
=3+5,
=8.
| 5 |
| 7 |
| 7 |
| 5 |
=
| 5 |
| 7 |
| 5 |
| 7 |
=(16-2)×
| 5 |
| 7 |
=14×
| 5 |
| 7 |
=10;
(2)
| 12 |
| 13 |
| 5 |
| 2 |
| 1 |
| 3 |
=
| 12 |
| 13 |
| 5 |
| 2 |
| 12 |
| 13 |
| 1 |
| 3 |
=
| 30 |
| 13 |
| 4 |
| 13 |
=2;
(3)[6.85-(0.65+0.7)]÷2.5,
=[6.85-1.35]÷2.5,
=5.5÷2.5,
=2.2;
(4)(
| 3 |
| 7 |
| 3 |
| 5 |
| 4 |
| 5 |
=
| 3 |
| 7 |
| 3 |
| 5 |
| 4 |
| 5 |
=3+(
| 21 |
| 5 |
| 4 |
| 5 |
=3+5,
=8.
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