题目内容
用你自己喜欢的方法解答.
(1)(
| (2)5.3×
| ||||||||
| (3)13.92-(1.19+9.92)-2.81 | (4)895÷382×540÷895×382÷540. |
(1)(
+
)×23×19,
=
×23×19+
×23×19,
=23+19
=42;
(2)5.3×
+0.75×
+750%×0.1,
=5.3×0.75+0.75×3.7+0.75×1
=(5.3+3.7+1)×0.75,
=10×0.75,
=7.5;
(3)13.92-(1.19+9.92)-2.81,
=13.92-1.19-9.92-2.81,
=13.92-9.92-(1.19+2.81),
=4-4,
=0;
(4)895÷382×540÷895×382÷540,
=(895÷895)×(382÷382)×(540÷540),
=1.
| 1 |
| 19 |
| 1 |
| 23 |
=
| 1 |
| 19 |
| 1 |
| 23 |
=23+19
=42;
(2)5.3×
| 3 |
| 4 |
| 37 |
| 10 |
=5.3×0.75+0.75×3.7+0.75×1
=(5.3+3.7+1)×0.75,
=10×0.75,
=7.5;
(3)13.92-(1.19+9.92)-2.81,
=13.92-1.19-9.92-2.81,
=13.92-9.92-(1.19+2.81),
=4-4,
=0;
(4)895÷382×540÷895×382÷540,
=(895÷895)×(382÷382)×(540÷540),
=1.
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