题目内容

用最喜欢的方法计算.
12.5×38×0.8
(8.5-4)×(0.32÷1.6)
6.5×4.6+6.5×15
4
9
8
÷
[
3
4
+(1-
1
8
)].

(1)12.5×38×0.8,
=12.5×0.8×38,
=10×38,
=380;

(2)(8.5-4)×(0.32÷1.6),
=4.5×0.2,
=0.9;

(3)6.5×4.6+6.5×15,
=6.5×(4.6+15),
=6.5×19.6,
=127.4;

(4)4
9
8
÷
[
3
4
+(1-
1
8
)],
=4
9
8
÷
[
3
4
+
7
8
],
=4
9
8
÷
13
8

=
41
13
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