题目内容
计算:(用你喜欢的方法计算下面各题)
| 2.5×320×0.125 | ||||||||
7.5-(
| 75×
|
(1)
×0.25+
×3.6,
=
×
+
×3.6,
=(
+3.6)×
,
=4×
,
=1;
(2)2.5×320×0.125,
=2.5×(4×80)×0.125,
=(2.5×4)×(80×0.125),
=10×10,
=100;
(3)7.5-(
+
)×4.5,
=7.5-(
×4.5+
×4.5),
=7.5-(0.9+1.5),
=7.5-2.4,
=5.1;
(4)75×
+24×60%+
,
=75×
+24×
+
,
=(75+24+1)×
,
=100×
,
=60.
| 2 |
| 5 |
| 1 |
| 4 |
=
| 2 |
| 5 |
| 1 |
| 4 |
| 1 |
| 4 |
=(
| 2 |
| 5 |
| 1 |
| 4 |
=4×
| 1 |
| 4 |
=1;
(2)2.5×320×0.125,
=2.5×(4×80)×0.125,
=(2.5×4)×(80×0.125),
=10×10,
=100;
(3)7.5-(
| 1 |
| 5 |
| 1 |
| 3 |
=7.5-(
| 1 |
| 5 |
| 1 |
| 3 |
=7.5-(0.9+1.5),
=7.5-2.4,
=5.1;
(4)75×
| 3 |
| 5 |
| 3 |
| 5 |
=75×
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
=(75+24+1)×
| 3 |
| 5 |
=100×
| 3 |
| 5 |
=60.
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