题目内容
计算下面各题,能简算的要简算:
| 8×
| ||||||||||||||
| (
| ||||||||||||||
3.6+
|
| ||||||||||||||
47×
| 63×
| ||||||||||||||
|
(1)
+
×
,
=
+
,
=
;
(2)8×
×
=
;
(3)
×
+
×
,
=
×(
+
),
=
×1,
=
;
(4)(
+
+
)×24,
=
×24+
×24+
×24,
=9+18+8,
=35;
(5)3.6+
+6.4+
,
=(3.6+6.4)+(
+
),
=10+1,
=11;
(6)
-(
+
),
=
-
-
,
=1-
,
=
;
(7)47×
,
=(46+1)×
,
=46×
+
,
=3+
,
=3
;
(8)63×
,
=63×(1-
)
=63-1
,
=61
;
(9)
×25-
,
=
×(25-1),
=
×24,
=9.
| 1 |
| 4 |
| 3 |
| 4 |
| 1 |
| 3 |
=
| 1 |
| 4 |
| 1 |
| 4 |
=
| 1 |
| 2 |
(2)8×
| 3 |
| 4 |
| 1 |
| 15 |
| 2 |
| 5 |
(3)
| 5 |
| 7 |
| 1 |
| 4 |
| 3 |
| 4 |
| 5 |
| 7 |
=
| 5 |
| 7 |
| 1 |
| 4 |
| 3 |
| 4 |
=
| 5 |
| 7 |
=
| 5 |
| 7 |
(4)(
| 3 |
| 8 |
| 3 |
| 4 |
| 1 |
| 3 |
=
| 3 |
| 8 |
| 3 |
| 4 |
| 1 |
| 3 |
=9+18+8,
=35;
(5)3.6+
| 3 |
| 7 |
| 4 |
| 7 |
=(3.6+6.4)+(
| 3 |
| 7 |
| 4 |
| 7 |
=10+1,
=11;
(6)
| 5 |
| 4 |
| 2 |
| 7 |
| 1 |
| 4 |
=
| 5 |
| 4 |
| 1 |
| 4 |
| 2 |
| 7 |
=1-
| 2 |
| 7 |
=
| 5 |
| 7 |
(7)47×
| 3 |
| 46 |
=(46+1)×
| 3 |
| 46 |
=46×
| 3 |
| 46 |
| 3 |
| 46 |
=3+
| 3 |
| 46 |
=3
| 3 |
| 46 |
(8)63×
| 57 |
| 58 |
=63×(1-
| 1 |
| 58 |
=63-1
| 5 |
| 58 |
=61
| 53 |
| 58 |
(9)
| 3 |
| 8 |
| 3 |
| 8 |
=
| 3 |
| 8 |
=
| 3 |
| 8 |
=9.
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