问题 解答题
下列各题怎么简算就怎么算.
(1)99.14×16+0.86×1
(2)125×0.59×0.8
(3)
7
3
×0.25×
2
7
×4

(4)4725-379-221
(5)6
7
8
×(2-1
37
50
)+3
1
8
×
13
50
答案

(1)99.14×16+0.86×1,

=(100-0.86)×16+0.86×1,

=1600-0.86×16+0.86×1,

=1600-0.86×(16-1),

=1600-0.86×15,

=1600-12.9,

=1587.1;

(2)125×0.59×0.8,

=(125×0.8)×0.59,

=100×0.59,

=59;

(3)

7
3
×0.25×
2
7
×4,

=

7
3
×
2
7
×(0.25×4),

=

2
3
×1,

=

2
3

(4)4725-379-221,

=4725-(379+221),

=4725-600,

=4125;

(5)6

7
8
×(2-1
37
50
)+3
1
8
×
13
50

=

55
8
×
13
50
+
25
8
×
13
50

=(

55
8
+
25
8
)×
13
50

=10×

13
50

=

13
5

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多项选择题