下面各題怎樣簡便就怎樣算
14.4÷0.125÷8 |
(+)×24× |
2.34×56-23.4×5.6 |
1.5×+0.8×5.5+2× |
1005÷[42×(-)] |
÷[1-(+)]. |
(1)14.4÷0.125÷8,
=14.4÷(0.125×8),
=14.4÷1,
=14.4;
(2)(
+
)×24×
,
=
×24×
+
×24×
,
=
+
,
=
;
(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×
,
=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×(
-
)],
=1005÷[42×
-42×
],
=1005÷[35-30],
=1005÷5,
=201;
(6)
÷[1-(
+
)],
=
÷[1-
],
=
÷
,
=
×
,
=
.
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