题目内容
用你喜欢的方法计算
(1)4.86×〔1÷(2.1-2.09)〕
(2)
÷
-
×
(3)2.5×(1.9+1.9+1.9+1.9)
(4)87.5×0.25+75×87.5%
(1)4.86×〔1÷(2.1-2.09)〕
(2)
| 1 |
| 5 |
| 6 |
| 25 |
| 2 |
| 7 |
| 7 |
| 32 |
(3)2.5×(1.9+1.9+1.9+1.9)
(4)87.5×0.25+75×87.5%
(1)4.86×〔1÷(2.1-2.09)〕,
=4.86×〔1÷0.01〕,
=4.86×100,
=486;
(2)
÷
-
×
,
=
×
-
×
,
=
-
,
=
;
(3)2.5×(1.9+1.9+1.9+1.9),
=2.5×1.9×4,
=2.5×4×1.9,
=10×1.9,
=19;
(4)87.5×0.25+75×87.5%,
=0.875×25+75×0.875,
=(25+75)×0.875,
=100×0.875,
=87.5.
=4.86×〔1÷0.01〕,
=4.86×100,
=486;
(2)
| 1 |
| 5 |
| 6 |
| 25 |
| 2 |
| 7 |
| 7 |
| 32 |
=
| 1 |
| 5 |
| 25 |
| 6 |
| 2 |
| 7 |
| 7 |
| 32 |
=
| 5 |
| 6 |
| 1 |
| 16 |
=
| 37 |
| 48 |
(3)2.5×(1.9+1.9+1.9+1.9),
=2.5×1.9×4,
=2.5×4×1.9,
=10×1.9,
=19;
(4)87.5×0.25+75×87.5%,
=0.875×25+75×0.875,
=(25+75)×0.875,
=100×0.875,
=87.5.
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