题目内容
写出计算过程并得出结果
(1)138×1
+23.3×(2-75%)-125%×38+(1+0.25)×28.7
(2)
.
(1)138×1
| 1 |
| 4 |
(2)
12
| ||||||||
2
|
(1)138×1
+23.3×(2-75%)-125%×38+(1+0.25)×28.7,
=138×1.25+23.3×1.25-1.25×38+1.25×28.7,
=(138+23.3-38+28.7)×1.25,
=[(138-38)+(23.3+28.7)]×1.25,
=(100+52)×1.25,
=100×1.25+52×1.25,
=125+13×(4×1.25),
=125+13×5,
=125+65,
=190.
(2)
,
=
,
=
,
=
,
=1.
| 1 |
| 4 |
=138×1.25+23.3×1.25-1.25×38+1.25×28.7,
=(138+23.3-38+28.7)×1.25,
=[(138-38)+(23.3+28.7)]×1.25,
=(100+52)×1.25,
=100×1.25+52×1.25,
=125+13×(4×1.25),
=125+13×5,
=125+65,
=190.
(2)
12
| ||||||||
2
|
=
| ||||||||
|
=
| 48-18 |
| 30 |
=
| 30 |
| 30 |
=1.
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