题目内容
| 合理计算. 12÷(
|
|
|
①12÷(
+
),
=12÷(
+
),
=12÷
,
=12×2,
=24;
②
×(
-
),
=
×(
-
),
=
×
,
=
;
③
×33%+33%÷5,
=0.8×0.33+0.33×0.2,
=0.33×(0.8+0.2),
=0.33×1,
=0.33;
| 1 |
| 3 |
| 1 |
| 6 |
=12÷(
| 2 |
| 6 |
| 1 |
| 6 |
=12÷
| 1 |
| 2 |
=12×2,
=24;
②
| 3 |
| 10 |
| 5 |
| 7 |
| 10 |
| 21 |
=
| 3 |
| 10 |
| 15 |
| 21 |
| 10 |
| 21 |
=
| 3 |
| 10 |
| 5 |
| 21 |
=
| 1 |
| 14 |
③
| 4 |
| 5 |
=0.8×0.33+0.33×0.2,
=0.33×(0.8+0.2),
=0.33×1,
=0.33;
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