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ǰλãҳ>>10 9һ8ʮ7һ6ʮ5һ4ʮ3һ2ʮ1дɵݵʽôд?>>

10 9һ8ʮ7һ6ʮ5һ4ʮ3һ2ʮ1дɵݵʽôд?

ԭʽ=(109+1)+(7+3)-(8+2)-(6+4)=110+10-10-10=100ݵʽѧ,оǵȺǶŵġ

=100-81+64-49+36-25+16-9+4-1=19+15+11+7+3=30+15+10=55

10+9+8+7+6+5+4+3+2+1=(10+1)+(9+2)+(8+3)+(7+4)+(6+5)=11*5=55

10-9+8-7+6-5+4-3+2-1=(10-9)+(8-7)+(6-5)+(4-3)+(2-1)=1*5=5 1 n=10/2=5 5

7/6-(7/6-7/9)=7/6-7/6+7/9=7/9 9/10+5/6-3/4=54/60+50/60-45/60=59/60 1/2+1/6+1/12=1-1/2+1/2-1/3+1/3-1/4=1-1/4=3/4 7/15+4/15+2/5+3/5߼ݰƷή=11/15+1=26/15

3/4-(2/5+3/10)= =3/4-(4/10+3/10)=3/4-4/10=15/20-8/20=7/205/7+1/49/4=5/7-8/4=5/7-2=5/7-14/7=-9/73/4+3/6-5/8 =18/24+12/24-15/24=15/245/9+(3/4-1/2)=5/9+3/4-2/4=5/9+1/4=20/36+9/36=29/361/10+3/8-1/2= =1/10+3/8-4/8=1/10-1/8=4/40-5/40=-1/403/5-(2/15)=3/5-2/15=9/15-2/15=7/15

(1+10)X10/2=55

5

(1)5/6-4/9+1/6-2/9=(5/6+1/6)-(4/9+2/9)=1-2/3=1/3(2)5/8+1/8-3/10-1/10=(5/8+1/8)-(3/10+1/10)=3/4-2/5=15/20-8/20=7/20(3)9/10-(1/10+2/5)=9/10-1/10-2/5=4/5-2/5=2/5

(1)4/9*3/57/10=4/9*3/5*10/7=8/21(2)9-(1/12+1/8)*24=9-(2+3)=9-5=4(3)11/9*12.5*9/10*8=11/9*25/2*9/10*8=110(4)4/9*15+5/91/15=4/9*15+5/9*15=(4/9+5/9)*15=1*15=15

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