问题
解答题
下面各题怎样简便就怎样算
|
答案
(1)14.4÷0.125÷8,
=14.4÷(0.125×8),
=14.4÷1,
=14.4;
(2)(
+1 6
)×24×1 8
,1 5
=
×24×1 6
+1 5
×24×1 8
,1 5
=
+4 5
,3 5
=
;7 5
(3)2.34×56-23.4×5.6,
=2.34×56-2.34×56
=2.34×(56-56),
=0;
(4)1.5×
+0.8×5.5+2×4 5
,4 5
=1.5×0.8+0.8×5.5+2×0.8,
=(1.5+5.5+2)×0.8,
=9×0.8,
=7.2;
(5)1005÷[42×(
-5 6
)],5 7
=1005÷[42×
-42×5 6
],5 7
=1005÷[35-30],
=1005÷5,
=201;
(6)
÷[1-(12 35
+1 5
)],1 7
=
÷[1-12 35
],12 35
=
÷12 35
,24 35
=
×12 35
,35 24
=
.1 2