题目内容

计算下面各题.
675-225÷15×45
3.5×2.6+5.4÷18
3
5
6
-2
3
4
)÷(
2
7
+
13
14
(3.86+2×3.86+3.86)×0.25.
(1)675-225÷15×45,
=675-15×45,
=675-675,
=0;

(2)3.5×2.6+5.4÷18,
=9.1+0.3,
=9.4;

(3)(3
5
6
-2
3
4
)÷(
2
7
+
13
14
),
=
13
12
÷
17
14

=
91
102


(4)(3.86+2×3.86+3.86)×0.25,
=(3.86×4)×0.25,
=3.86×(4×0.25),
=3.86×1,
=3.86.
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