计算:(用你喜欢的方法计算下面各题) 25×0.25+14×3.6 2.5×320×0.125 7.5-(15
计算:(用你喜欢的方法计算下面各题)25×0.25+14×3.62.5×320×0.1257.5-(15+13)×4.575×35+24×60%+35....
计算:(用你喜欢的方法计算下面各题) 25×0.25+14×3.6 2.5×320×0.125 7.5-(15+13)×4.5 75×35+24×60%+35.
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(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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