用递等式计算.(1)370×203-19266÷38(2)32×3.1+1÷1.25(3)×(39÷35)÷0.9(4)(9-3.06÷)×1(5)(3-1×56(6

发布时间:2020-08-04 15:17:16

用递等式计算.
(1)370×203-19266÷38
(2)32×3.1+1÷1.25
(3)×(39÷35)÷0.9
(4)(9-3.06÷)×1
(5)(3-1×56
(6).

网友回答

解:(1)370×203-19266÷38,
=75110-507,
=74603;

(2)32×3.1+1÷1.25,
=9.92+0.8,
=10.72;

(3)×(39÷35)÷0.9,
=×÷0.9,
=0.9÷0.9,
=1;

(4)(9-3.06÷)×1,
=(9-5.1)×1,
=3.9×1,
=4.8;

(5)(3-1×56,
=3×56-156+1×56,
=168-49+64,
=119+64,
=183;

(6),
=[1]×,
=[]×,
=,
=.
解析分析:(1)(2)(3)(4)(6)依据四则运算顺序,先算第二级运算,再算第一级运算,如果只含有同一级运算,按照从左到右顺序计算,有括号先算括号里面的顺序解答,(5)运用乘法分配律计算即可.

点评:正确依据四则运算顺序进行计算,以及正确运用乘法分配律解决问题是本题考查知识点,注意计算结果的准确性.
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