题目内容
脱式计算.
205×68-8960
(2808÷26-10.8)×2.5
2
-2
÷1
×1
+1
÷[1
×(0.5+
)].
205×68-8960
(2808÷26-10.8)×2.5
2
| 2 |
| 5 |
| 2 |
| 5 |
| 3 |
| 5 |
| 1 |
| 2 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 5 |
| 1 |
| 3 |
(1)205×68-8960,
=13940-8960,
=4980;
(2)(2808÷26-10.8)×2.5,
=(108-10.8)×2.5,
=97.2×2.5,
=243;
(3)2
-2
÷1
×1
+1
,
=2
-
×1
+1
,
=2
-
+1
,
=
+1
,
=1
;
(4)
÷[1
×(0.5+
)],
=
÷[1
×
],
=
÷
,
=
.
=13940-8960,
=4980;
(2)(2808÷26-10.8)×2.5,
=(108-10.8)×2.5,
=97.2×2.5,
=243;
(3)2
| 2 |
| 5 |
| 2 |
| 5 |
| 3 |
| 5 |
| 1 |
| 2 |
| 2 |
| 3 |
=2
| 2 |
| 5 |
| 3 |
| 2 |
| 1 |
| 2 |
| 2 |
| 3 |
=2
| 2 |
| 5 |
| 9 |
| 4 |
| 2 |
| 3 |
=
| 3 |
| 20 |
| 2 |
| 3 |
=1
| 49 |
| 60 |
(4)
| 2 |
| 3 |
| 2 |
| 5 |
| 1 |
| 3 |
=
| 2 |
| 3 |
| 2 |
| 5 |
| 5 |
| 6 |
=
| 2 |
| 3 |
| 7 |
| 6 |
=
| 4 |
| 7 |
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