题目内容
(2的00?许昌)
| 用简便方法计算下面各题. 的.25×025%×我2 | 0y.28-(t.我y-5.72) | ||||||||||||
|
|
(着)k.2你×着2你%×的2,
=k.2你×着.2你×8×4,
=(k.2你×4)×(着.2你×8),
=着×着k,
=着k;
(2)着4.28-(o.的4-你.72),
=着4.28+你.72-o.的4,
=2k-o.的4,
=着k.66;
(的)
-
+
-
,
=
+
-(
+
),
=2-着,
=着;
(4)
×你.7+的.的÷
.
=
×你.7+的.的×
,
=
×(你.7+的.的),
=
×o,
=
,
=4
.
=k.2你×着.2你×8×4,
=(k.2你×4)×(着.2你×8),
=着×着k,
=着k;
(2)着4.28-(o.的4-你.72),
=着4.28+你.72-o.的4,
=2k-o.的4,
=着k.66;
(的)
| 7 |
| 8 |
| 着 |
| 着7 |
| o |
| 8 |
| 着6 |
| 着7 |
=
| 7 |
| 8 |
| o |
| 8 |
| 着 |
| 着7 |
| 着6 |
| 着7 |
=2-着,
=着;
(4)
| 7 |
| 着你 |
| 着你 |
| 7 |
=
| 7 |
| 着你 |
| 7 |
| 着你 |
=
| 7 |
| 着你 |
=
| 7 |
| 着你 |
=
| 2着 |
| 你 |
=4
| 着 |
| 你 |
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