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+6.5×15.4,
=6.5×(4.6+15.4),
=6.5×20,
=130;

(4)
9
8
÷[
3
4
÷(1-
1
8
)],
=
9
8
÷[
3
4
÷
7
8
],
=
9
8
÷[
3
4
×
8
7
],
=
9
8
÷
6
7

=
9
8
×
7
6

=
21
16
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