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)
(4)4725-379-221 (5)6
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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)
×0.25×7 3
×4,2 7
=
×7 3
×(0.25×4),2 7
=
×1,2 3
=
;2 3
(4)4725-379-221,
=4725-(379+221),
=4725-600,
=4125;
(5)6
×(2-17 8
)+337 50
×1 8
,13 50
=
×55 8
+13 50
×25 8
,13 50
=(
+55 8
)×25 8
,13 50
=10×
,13 50
=
.13 5