问题
解答题
用自己喜欢的方式计算下面各题(要写出主要的解答过程) (1)3600-800÷40×35 (2)64-15.8-14.2 (3)(56×
(4)(
(5)18×
(6)38÷[2.5×(4.36+3.64)]. |
答案
(1)3600-800÷40×35,
=3600-20×35,
=3600-700,
=2900;
(2)64-15.8-14.2,
=64-(15.8+14.2),
=64-30,
=34;
(3)(56×
-27)×5 7
,9 13
=(40-27)×
,9 13
=13×
,9 13
=9;
(4)(
-5 12
+1 6
)×36,7 18
=
×36-5 12
×36+1 6
×36,7 18
=15-6+14,
=9+14,
=23;
(5)18×
-5×9 14
+9 14
,9 14
=(18-5+1)×
,9 14
=14×
,9 14
=9;
(6)38÷[2.5×(4.36+3.64)],
=38÷[2.5×8],
=38÷20,
=1.9.