题目内容
| 4100-204×15. | 2.5×2.4÷12-0.4. | ||||||||||||
2-
| [3
|
(1)4100-204×15
=4100-3060,
=1040;
(2)2.5×2.4÷12-0.4
=6÷12-0.4,
=0.5-0.4,
=0.1;
(3)2-
×2
÷2
=2-
×
÷2
,
=2-
÷2
,
=2-
×
,
=2-
,
=
-
,
=1
;
(4)[3
+(3.6-2
)×
]÷3.5
=[3
+(
-
)×
]÷3.5,
=[3
+
×
]÷3.5,
={3
+
}÷3.5,
={
+
}÷3.5,
=
÷3.5,
=3.5÷3.5,
=1.
=4100-3060,
=1040;
(2)2.5×2.4÷12-0.4
=6÷12-0.4,
=0.5-0.4,
=0.1;
(3)2-
| 3 |
| 4 |
| 1 |
| 3 |
| 4 |
| 5 |
=2-
| 3 |
| 4 |
| 7 |
| 3 |
| 4 |
| 5 |
=2-
| 7 |
| 4 |
| 4 |
| 5 |
=2-
| 7 |
| 4 |
| 5 |
| 14 |
=2-
| 5 |
| 8 |
=
| 16 |
| 8 |
| 5 |
| 8 |
=1
| 3 |
| 8 |
(4)[3
| 1 |
| 3 |
| 11 |
| 15 |
| 5 |
| 26 |
=[3
| 1 |
| 3 |
| 54 |
| 15 |
| 41 |
| 15 |
| 5 |
| 26 |
=[3
| 1 |
| 3 |
| 13 |
| 15 |
| 5 |
| 26 |
={3
| 1 |
| 3 |
| 1 |
| 6 |
={
| 20 |
| 6 |
| 1 |
| 6 |
=
| 7 |
| 2 |
=3.5÷3.5,
=1.
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