问题
解答题
|
答案
(1)2005-395+605,
=(2000+5)-(400-5)+(600+5),
=(2000-400+600)+5+5+5,
=2200+15,
=2215;
(2)16×125×21,
=2×8×125×21,
=2×21×(8×125),
=42×1000,
=42000;
(3)
÷(1-1 4
),1 3
=
÷1 4
,2 3
=
×1 4
,3 2
=
;3 8
(4)
-8×4 5
,3 32
=
-4 5
,3 4
=
-16 20
,15 20
=
;1 20
(5)(
-5 6
)÷4 5
,4 15
=(
-25 30
)÷24 30
,4 15
=
×1 30
,15 4
=
;1 8
(6)4.8×96+4.8÷
,1 4
=4.8×96+4.8×4,
=(96+4)×4.8,
=100×4.8,
=480.