问题
解答题
计算下面各题,怎样简便就怎样算.
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答案
(1)(125+
)×8,7 32
=125×8+
×8,7 32
=1000+1.75,
=1001.75;
(2)
×20%+19 4
×19 4
,4 5
=
×(20%+19 4
),4 5
=
×1,19 4
=
;19 4
(3)25×32×125,
=25×(4×8)×125,
=(25×4)×(8×125),
=100×1000,
=100000;
(4)99×
,1 100
=(100-1)×
,1 100
=100×
-1×1 100
,1 100
=1-
,1 100
=
;99 100
(5)
×(122-21-1)÷3 4
,1 100
=
×100÷3 4
,1 100
=75÷
,1 100
=7500;
(6)
÷1 27
×4 5
×125 2
×270,4 5
=
×1 27
×5 4
×125 2
×270,4 5
=125×5,
=625.