题目内容
用简便方法计算
|
| ||||||||||
(
| 11.58-(1.58+
|
(1)
×11-
×3,
=
×(11-3),
=
×8,
=3;
(2)
÷7+
×
,
=
×
+
×
,
=(
+
)×
,
=
×
,
=
;
(3)(
-
+
)×12,
=
×12-
×12+
×12,
=4-2+3,
=5;
(4)11.58-(1.58+
),
=11.58-1.58-
,
=10-
,
=9
.
| 3 |
| 8 |
| 3 |
| 8 |
=
| 3 |
| 8 |
=
| 3 |
| 8 |
=3;
(2)
| 8 |
| 13 |
| 1 |
| 7 |
| 6 |
| 13 |
=
| 8 |
| 13 |
| 1 |
| 7 |
| 1 |
| 7 |
| 6 |
| 13 |
=(
| 8 |
| 13 |
| 6 |
| 13 |
| 1 |
| 7 |
=
| 14 |
| 13 |
| 1 |
| 7 |
=
| 2 |
| 13 |
(3)(
| 1 |
| 3 |
| 1 |
| 6 |
| 1 |
| 4 |
=
| 1 |
| 3 |
| 1 |
| 6 |
| 1 |
| 4 |
=4-2+3,
=5;
(4)11.58-(1.58+
| 5 |
| 11 |
=11.58-1.58-
| 5 |
| 11 |
=10-
| 5 |
| 11 |
=9
| 6 |
| 11 |
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