第1个回答 2009-09-08
9
35
1/3
107/7
6399/80
10
7/10
9
1/5
28/3
405/256
过程怎么写啊。。。我晕了哦
第2个回答 2009-09-08
9/10(11-1)=9
(12/30+25/30)=27
7/9(5/7-2/7)=1/3
(21*5/7)+(2/5*5/7)=15+2/7=107/7
(1-1/80)*81=6035/80
10
7/10
...
第3个回答 2009-09-08
1. (9/10)*11-(9/10)=(9/10)*(11-1)=(9/10)*10=9
2. (2/5+5/6)*30=(2/5)*30+(5/6)*30=12+25=37
3. (21+(2/5))*(5/7)=21*(5/7)+(2/5)*(5/7)=15+2/7=107/7
4. (5/7)*(7/9)-(2/7)*(7/9)=5/9-2/9=1/3
5. (79/80)*81=(1-(1/80))*81=81-81/80=80-1/80=6399/80
6. ((3/4)-(1/3))*24=(3/4)*24-(1/3)*24=18-8=10
7. (7/10)*(5/6)+(1/6)*(7/10)=(7/10)*((5/6)+(1/6))=7/10
8. (3/4)*9-(3/4)=(3/4)*(9-1)=(3/4)*8=6
9. (1/2)*(4/5)-(4/5)*(1/4)=(4/5)*((1/2)-(1/4))=(4/5)*(1/4)=1/5
10. 24*((3/8)+(1/3))=24*(3/8)+24*(1/3)=9+8=17
11. (11/16)*9*(5/16)=.. 这题貌似只能硬算
=(99/16)*(5/16)=495/256
第4个回答 2009-09-08
1)(9/10)*10=9
2)2*6+5*5=37
3)5/9-2/9=1/3
4)15+2/7=107/7
5)6399/80
6)18-8=10
7)7/10
8)6
9)1/5
10)28/3
495/256