题目内容
计算下面各题,能简便计算的要简便计算.
| 8×0.56×12.5 | 6.25+
| ||||||||||||||||
|
|
(1)8×0.56×12.5,
=8×12.5×0.56,
=100×0.56,
=56;
(2)6.25+
-2.25+
,
=(6.25-2.25)+(
+
),
=4+1,
=5;
(3)
×
+
×
,
=
×(
+
),
=
×1,
=
;
(4)
÷[(
+
)×
],
=
÷[
×
],
=
÷
,
=5.
=8×12.5×0.56,
=100×0.56,
=56;
(2)6.25+
| 5 |
| 7 |
| 2 |
| 7 |
=(6.25-2.25)+(
| 2 |
| 7 |
| 5 |
| 7 |
=4+1,
=5;
(3)
| 5 |
| 11 |
| 3 |
| 7 |
| 4 |
| 7 |
| 5 |
| 11 |
=
| 5 |
| 11 |
| 3 |
| 7 |
| 4 |
| 7 |
=
| 5 |
| 11 |
=
| 5 |
| 11 |
(4)
| 1 |
| 3 |
| 2 |
| 3 |
| 1 |
| 5 |
| 1 |
| 13 |
=
| 1 |
| 3 |
| 13 |
| 15 |
| 1 |
| 13 |
=
| 1 |
| 3 |
| 1 |
| 15 |
=5.
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