简算:[23.4+15.4×(5+3/7)]×20%
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简算:[23.4+15.4×(5+3/7)]×20%
![简算:[23.4+15.4×(5+3/7)]×20%](/uploads/image/z/5052816-0-6.jpg?t=%E7%AE%80%E7%AE%97%EF%BC%9A%5B23.4%2B15.4%C3%97%EF%BC%885%2B3%2F7%EF%BC%89%5D%C3%9720%EF%BC%85)
[23.4+15.4×(5+3/7)]×20%=(23.4+15.4×5+15.4×3/7)×20%
=[23.4+(15+0.4)×5+11×1.4×3/7]×20%
=(23.4+77+6.6)×20%
=(30+77)×0.2
=107×0.2
=21.4
=[23.4+(15+0.4)×5+11×1.4×3/7]×20%
=(23.4+77+6.6)×20%
=(30+77)×0.2
=107×0.2
=21.4
简算:[23.4+15.4×(5+3/7)]×20%
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