问题
解答题
用递等式计算下面各题. (1)4789-5768÷56×27 (2)(5.1÷0.17+4.2)×4.5 (3)(0.75-
(4)
|
答案
(1)4789-5768÷56×27,
=4789-103×27,
=4789-2781,
=2008;
(2)(5.1÷0.17+4.2)×4.5,
=(30+4.2)×4.5,
=34.2×4.5,
=153.9;
(3)(0.75-
)×(3 16
+2 9
),1 3
=
×9 16
,5 9
=
;5 16
(4)
÷[(1 3
+2 3
)×1 5
],3 13
=
÷[1 3
×13 15
],3 13
=
÷1 3
,1 5
=
.5 3