题目内容
用递等式计算:(能简算的要简算)
①2.1×0.5÷4.2;
②4080÷12-24×1.5;
③24×(
+
-
);
④
÷〔
×(
+
)〕.
①2.1×0.5÷4.2;
②4080÷12-24×1.5;
③24×(
| 1 |
| 4 |
| 2 |
| 3 |
| 1 |
| 6 |
④
| 2 |
| 5 |
| 5 |
| 8 |
| 9 |
| 10 |
| 1 |
| 6 |
①2.1×0.5÷4.2,
=1.05÷4.2,
=0.25;
②4080÷12-24×1.5,
=340-36,
=304;
③24×(
+
-
),
=24×
+24×
-24×
,
=6+16-4,
=22-4,
=18;
④
÷[
×(
+
)],
=
÷[
×
],
=
÷
,
=
.
=1.05÷4.2,
=0.25;
②4080÷12-24×1.5,
=340-36,
=304;
③24×(
| 1 |
| 4 |
| 2 |
| 3 |
| 1 |
| 6 |
=24×
| 1 |
| 4 |
| 2 |
| 3 |
| 1 |
| 6 |
=6+16-4,
=22-4,
=18;
④
| 2 |
| 5 |
| 5 |
| 8 |
| 9 |
| 10 |
| 1 |
| 6 |
=
| 2 |
| 5 |
| 5 |
| 8 |
| 16 |
| 15 |
=
| 2 |
| 5 |
| 2 |
| 3 |
=
| 3 |
| 5 |
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