题目内容
计算,能简算的要简算.
43×
|
| 2-
| ||||||||||||||||
|
| (0.75-
|
(1)43×
,
=(42+1)×
,
=42×
+1×
,
=9+
,
=9
,
(2)
×
+
÷
,
=
×
+
×
,
=
×(
+
),
=
×1,
=
;
(3)2-
÷
-
,
=2-
×
-
,
=2-
-
,
=2-(
+
),
=2-2,
=0;
(4)
+
÷
,
=
+
×
,
=
+
,
=
,
=1
;
(5)
÷
×0.64,
=
×
×0.64,
=1.2;
(6)(0.75-
)×(
+
),
=
×
,
=
.
| 9 |
| 42 |
=(42+1)×
| 9 |
| 42 |
=42×
| 9 |
| 42 |
| 9 |
| 42 |
=9+
| 9 |
| 42 |
=9
| 3 |
| 14 |
(2)
| 4 |
| 7 |
| 5 |
| 9 |
| 4 |
| 9 |
| 7 |
| 4 |
=
| 4 |
| 7 |
| 5 |
| 9 |
| 4 |
| 9 |
| 4 |
| 7 |
=
| 4 |
| 7 |
| 5 |
| 9 |
| 4 |
| 9 |
=
| 4 |
| 7 |
=
| 4 |
| 7 |
(3)2-
| 6 |
| 13 |
| 9 |
| 26 |
| 2 |
| 3 |
=2-
| 6 |
| 13 |
| 26 |
| 9 |
| 2 |
| 3 |
=2-
| 4 |
| 3 |
| 2 |
| 3 |
=2-(
| 4 |
| 3 |
| 2 |
| 3 |
=2-2,
=0;
(4)
| 8 |
| 9 |
| 4 |
| 7 |
| 6 |
| 7 |
=
| 8 |
| 9 |
| 4 |
| 7 |
| 7 |
| 6 |
=
| 8 |
| 9 |
| 2 |
| 3 |
=
| 14 |
| 9 |
=1
| 5 |
| 9 |
(5)
| 5 |
| 14 |
| 4 |
| 21 |
=
| 5 |
| 14 |
| 21 |
| 4 |
=1.2;
(6)(0.75-
| 3 |
| 16 |
| 2 |
| 9 |
| 1 |
| 3 |
=
| 9 |
| 16 |
| 5 |
| 9 |
=
| 5 |
| 16 |
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