问题
解答题
下面各题怎样简便就怎样算.
|
答案
(1)46.7-15.03-4.97,
=46.7-(15.03+4.97),
=46.7-20,
=26.7;
(2)12.8-3.68÷2.3,
=12.8-1.6,
=11.2;
(3)(
-11 12
)÷(1+3 4
),1 2
=
÷1 6
,3 2
=
;1 9
(4)85×0.75+
×15,3 4
=(85+15)×
,3 4
=100×
,3 4
=75.