5·5·5·1，这四个数，用加减乘除包括括号，怎样算出等于24

显示全部楼层 · 2010-2-10 15:13:41

5*(5-1/5)=245*(5-(1/5))=245*(5-1/5)=245*(5-(1/5))=24(5-1/5)*5=24(5-(1/5))*5=24(5-1/5)*5=24(5-(1/5))*5=245*(5-1/5)=245*(5-(1/5))=245*(5-1/5)=245*(5-(1/5))=24(5-1/5)*5=24(5-(1/5))*5=24(5-1/5)*5=24(5-(1/5))*5=245*(5-1/5)=245*(5-(1/5))=245*(5-1/5)=245*(5-(1/5))=24(5-1/5)*5=24(5-(1/5))*5=24(5-1/5)*5=24(5-(1/5))*5=24

千问 · 2010-2-10 15:13:41

1:(5 - 1 ÷ 5) × 52:(5 - (1 ÷ 5)) × 53:5 × (5 - 1 ÷ 5)4:5 × (5 - (1 ÷ 5))(5-(1/5))*5(5-(1/5))*55*(5-(1/5))5*(5-(1/5))(5-(1/5))*5(5-(1/5))*55*(5-(1/5))5*(5-(1/5))(5-(1/5))*5(5-(1/5))*55*(5-(1/5))5*(5-(1/5))((5-(1/5))*5)=24

千问 · 2010-2-10 15:13:41

5*(5-1/5)=245*(5-(1/5))=245*(5-1/5)=245*(5-(1/5))=24(5-1/5)*5=24(5-(1/5))*5=24(5-1/5)*5=24(5-(1/5))*5=245*(5-1/5)=245*(5-(1/5))=245*(5-1/5)=245*(5-(1/5))=24(5-1/5)*5=24(5-(1/5))*5=24(5-1/5)*5=24(5-(1/5))*5=245*(5-1/5)=245*(5-(1/5))=245*(5-1/5)=245*(5-(1/5))=24(5-1/5)*5=24(5-(1/5))*5=24(5-1/5)*5=24(5-(1/5))*5=24 5 × (5 - 1 ÷ 5)2:5 × (5 - (1 ÷ 5))3:(5 - 1 ÷ 5) × 54:(5 - (1 ÷ 5)) × 5

千问 · 2010-2-10 15:13:41

1:5 × (5 - 1 ÷ 5)2:5 × (5 - (1 ÷ 5))3:(5 - 1 ÷ 5) × 54:(5 - (1 ÷ 5)) × 5参考资料：http://www.dffy.com/tool/24.htm

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千问 · 2010-2-10 15:13:41

(5*5)-1^5=245*(5-1/5)

千问 · 2010-2-10 15:13:41

1除以5=0.2, 5-0.2=4.8,
5乘4.8=24