题目内容
计算下面的题,能简算的要用简便方法计算哟,并写出简算步骤.
①2.35-81÷27×0.45②125×
×0.8×
③3×(
+
)-
④[1-(
+
)]÷
.
①2.35-81÷27×0.45②125×
| 5 |
| 3 |
| 3 |
| 10 |
③3×(
| 2 |
| 15 |
| 1 |
| 12 |
| 2 |
| 5 |
| 1 |
| 4 |
| 3 |
| 8 |
| 1 |
| 4 |
①2.35-81÷27×0.45,
=2.35-3×0.45,
=2.35-1.35,
=1;
②125×
×0.8×
,
=(125×0.8)×(
×
),
=100×
,
=50;
③3×(
+
)-
,
=3×
-
,
=
-
,
=
;
④[1-(
+
)]÷
,
=[1-
]×4,
=
×4,
=
.
=2.35-3×0.45,
=2.35-1.35,
=1;
②125×
| 5 |
| 3 |
| 3 |
| 10 |
=(125×0.8)×(
| 5 |
| 3 |
| 3 |
| 10 |
=100×
| 1 |
| 2 |
=50;
③3×(
| 2 |
| 15 |
| 1 |
| 12 |
| 2 |
| 5 |
=3×
| 13 |
| 60 |
| 2 |
| 5 |
=
| 13 |
| 20 |
| 2 |
| 5 |
=
| 1 |
| 4 |
④[1-(
| 1 |
| 4 |
| 3 |
| 8 |
| 1 |
| 4 |
=[1-
| 5 |
| 8 |
=
| 3 |
| 8 |
=
| 3 |
| 2 |
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