11/7+2.6+24/7+4.4= 1997+19998+1999+6=1-1/10-1/100-3/1000=

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11/7+2.6+24/7+4.4= 1997+19998+1999+6=1-1/10-1/100-3/1000=
11/7+2.6+24/7+4.4= 1997+19998+1999+6=
1-1/10-1/100-3/1000=

11/7+2.6+24/7+4.4= 1997+19998+1999+6=1-1/10-1/100-3/1000=
11/7+24/7+2.6+4.4=35/7+7=12
1997+3+19998+2+1999+1=200+20000+2000=24000
1-100/1000-10/1000-3/1000=1-113/1000=887/1000

没有计算器么?