A-A+
3÷〔9×(127-136)〕×1293.6÷〔(6-2.88)×(578-1.875)〕7
问题详情
3÷〔9×(
93.6÷〔(6-2.88)×(5
7.05×37+64×7.05-7.05
(2
8
8.1÷(4
参考答案
(1)3÷[9×(127-136)]×12,
=3÷[9×127-136×9]×12,
=3÷[13-14]×12,
=3÷112×12,
=36×12,
=432;
(2)93.6÷[(6-2.88)×(578-1.875)],
=93.6÷[3.12×4],
=93.6÷12.48,
=7.5;
(3)7.05×37+64×7.05-7.05,
=7.05×(37+64-1),
=7.05×100,
=705;
(4)(229×45+229×6.2-5.8×229-15÷920)×920,
=(209×0.8+209×6.2-5.8×209-209×0.2)×920,
=[209×(0.8+6.2-5.8-0.2)]×920,
=[209×1]×920,
=209×920,
=1;
(5)845÷[7.8+14×(2.75+1.25)],
=845÷[7.8+14×4],
=845÷(7.8+1),
=8.8÷8.8,
=1;
(6)8.1÷(417-0.05×70)÷127,
=8.1÷(417-3.5)÷127,
=8110÷914÷97,
=8110×149×79,
=495.
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