题目内容
| 能简算的要简算: 9.4×
|
| (
|
|
(1)9.4×
+0.25×
,
=9.4×0.25+0.25×0.6,
=(9.4+0.6)×0.25,
=10×0.25,
=2.5;
(2)
÷[1÷(
-
)],
=
÷[1÷
],
=
×
,
=
;
(3)(
+
-
)×30×2,
=(
+
-
)×60,
=
×60+
×60-
×60,
=42+50-48,
=92-48,
=44;
(4)
×(
-
÷2),
=
×(
-
),
=
×
,
=
.
| 1 |
| 4 |
| 3 |
| 5 |
=9.4×0.25+0.25×0.6,
=(9.4+0.6)×0.25,
=10×0.25,
=2.5;
(2)
| 1 |
| 6 |
| 3 |
| 5 |
| 3 |
| 10 |
=
| 1 |
| 6 |
| 3 |
| 10 |
=
| 1 |
| 6 |
| 3 |
| 10 |
=
| 1 |
| 20 |
(3)(
| 7 |
| 10 |
| 5 |
| 6 |
| 4 |
| 5 |
=(
| 7 |
| 10 |
| 5 |
| 6 |
| 4 |
| 5 |
=
| 7 |
| 10 |
| 5 |
| 6 |
| 4 |
| 5 |
=42+50-48,
=92-48,
=44;
(4)
| 3 |
| 14 |
| 3 |
| 4 |
| 1 |
| 10 |
=
| 3 |
| 14 |
| 3 |
| 4 |
| 1 |
| 20 |
=
| 3 |
| 14 |
| 14 |
| 20 |
=
| 3 |
| 20 |
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