（78.6-0.786×25+75％×21.4）÷2001
=（78.6-78.6×0.25+75％×21.4）÷2001
=（78.6×0.75+0.75×21.4）÷2001
=（(78.6+21.4）×0.75）÷2001
=（100×0.75）÷2001
=75/2001
=25/667
78.6-0.786×25+75％×21.4）÷2001
2个回答
相关问题
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（78.6-0.786×25+75%×21.4）÷15×1997=______．
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（78.6-0.786*25+0.75*21.4)除15*2001
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78.6-0.786*25+0.75*21.4
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(78.6-0.786/25+75%/21.4)*15/2011
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(78.6-0.786*25+0.75*21.4)/15*1997
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(78.6-0.786*25+75%*21.4)*1997 如何计算?
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（1）240×50%=（2）6.25：524=（3）5−4÷45=（4）21×13−0.375÷18=（5）0.75÷0
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6+0.39= 100-5.4-4.6= 2.8+6.3+7.2= 1000×0.78= 72×25×4= 78×5÷7
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199×99 1025÷25×（28+75） 0.25×78+2.2×2.5 0.3÷7分之9+4.2×9分之7 9分之
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简便计算：(1) 12.6÷5.6×0.8 (2) 4.5×78÷1.3 (3) 15.79÷4-3.79×0.25