题目内容
计算下列各题,能简算的要简算.
(1)
+(
-
)
(2)2-
-
(3)
-
+
(4)38.7-7.84÷1.4
(5)
-(
-
)
(6)8.8-2.5×1.8.
(1)
| 4 |
| 5 |
| 3 |
| 8 |
| 1 |
| 4 |
(2)2-
| 3 |
| 7 |
| 4 |
| 7 |
(3)
| 5 |
| 8 |
| 1 |
| 3 |
| 5 |
| 12 |
(4)38.7-7.84÷1.4
(5)
| 5 |
| 12 |
| 1 |
| 12 |
| 1 |
| 2 |
(6)8.8-2.5×1.8.
(1)
+(
-
),
=
+(
-
),
=
+
,
=
+
,
=
;
(2)2-
-
,
=2-(
+
),
=2-1,
=1;
(3)
-
+
,
=
-
+
,
=
+
,
=
;
(4)38.7-7.84÷1.4,
=38.7-5.6,
=33.1;
(5)
-(
-
),
=
-(
-
),
=
-(-
),
=
+
,
=
,
=
;
(6)8.8-2.5×1.8,
=8.8-4.5,
=4.3.
| 4 |
| 5 |
| 3 |
| 8 |
| 1 |
| 4 |
=
| 4 |
| 5 |
| 3 |
| 8 |
| 2 |
| 8 |
=
| 4 |
| 5 |
| 1 |
| 8 |
=
| 32 |
| 40 |
| 5 |
| 40 |
=
| 37 |
| 40 |
(2)2-
| 3 |
| 7 |
| 4 |
| 7 |
=2-(
| 3 |
| 7 |
| 4 |
| 7 |
=2-1,
=1;
(3)
| 5 |
| 8 |
| 1 |
| 3 |
| 5 |
| 12 |
=
| 15 |
| 24 |
| 8 |
| 24 |
| 10 |
| 24 |
=
| 7 |
| 24 |
| 10 |
| 24 |
=
| 17 |
| 24 |
(4)38.7-7.84÷1.4,
=38.7-5.6,
=33.1;
(5)
| 5 |
| 12 |
| 1 |
| 12 |
| 1 |
| 2 |
=
| 5 |
| 12 |
| 1 |
| 12 |
| 6 |
| 12 |
=
| 5 |
| 12 |
| 5 |
| 12 |
=
| 5 |
| 12 |
| 5 |
| 12 |
=
| 10 |
| 12 |
=
| 5 |
| 6 |
(6)8.8-2.5×1.8,
=8.8-4.5,
=4.3.
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