题目内容
| 计算下列各题(能简便计算的要简算) 56×(
| (
|
(1)56×(
-
),
=56×
-56×
,
=24-21,
=3;
(2)9.75-3.42-5.58,
=9.75-(3.42+5.58),
=9.75-9,
=0.75;
(3)125×0.25×3.2,
=125×0.25×4×0.8,
=125×0.8×0.25×4,
=100×1,
=100;
(4)(
-
)×
,
=
×
-
×
,
=
-
=
-
,
=
;
(5)
×
+
÷8
=
×
+
×
,
=
×(
+
),
=
×
,
=
;
(6)
+
×
,
=
×(3+
),
=
×
,
=
.
| 3 |
| 7 |
| 3 |
| 8 |
=56×
| 3 |
| 7 |
| 3 |
| 8 |
=24-21,
=3;
(2)9.75-3.42-5.58,
=9.75-(3.42+5.58),
=9.75-9,
=0.75;
(3)125×0.25×3.2,
=125×0.25×4×0.8,
=125×0.8×0.25×4,
=100×1,
=100;
(4)(
| 3 |
| 5 |
| 1 |
| 4 |
| 4 |
| 7 |
=
| 3 |
| 5 |
| 4 |
| 7 |
| 1 |
| 4 |
| 4 |
| 7 |
=
| 12 |
| 35 |
| 1 |
| 7 |
=
| 12 |
| 35 |
| 5 |
| 35 |
=
| 1 |
| 5 |
(5)
| 3 |
| 8 |
| 6 |
| 7 |
| 6 |
| 7 |
=
| 3 |
| 8 |
| 6 |
| 7 |
| 6 |
| 7 |
| 1 |
| 8 |
=
| 6 |
| 7 |
| 3 |
| 8 |
| 1 |
| 8 |
=
| 6 |
| 7 |
| 1 |
| 2 |
=
| 3 |
| 7 |
(6)
| 3 |
| 4 |
| 1 |
| 4 |
| 2 |
| 3 |
=
| 1 |
| 4 |
| 2 |
| 3 |
=
| 1 |
| 4 |
| 11 |
| 3 |
=
| 11 |
| 12 |
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