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How to write these math problems ~ ~ The percentage of the first volume of the sixth grade of primary school in Hebei Education Press.
1. 143,36,46,20.4%

2.2.5*84.5%=2. 1 125

reasonable

Original text:1:50 *10% * 300 =1500 (yuan)

Two: 50*30%*200=3000 (yuan)

Now: 1: 20* 15%*250=750 (yuan)

2: 60*60%* 160=5760 (yuan)

Three: 20*40%*80=640 (yuan)

Original total price

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