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1、844 (601-6)5 2+232-35= = =（2+38）15 （59-18)3 08= = = = 2589 （01-246）5 2+23-6 = = = (2+3) 26 2+56= 6314-18 = = =753512= (6-9) 7-345 = = = =2422 13 402+4= = +8 42 280= = = = =20 039 3050= = =819+877 665+74 91+4= = = = =62 707+65 +202 = = =100-5 53 02+02 = = =6003 4005 43255 = = = = =60123 64856 60+6 =
2、= = = =67366 500(096） 729= = = =64264-3 650-(5+430) 69-450= = = = 8098 9000-(4500+50) 6708 = = 146+95 900(1-6) 0-42= = = = 126+43 (91070） 760-540+1= = = = = +150-350 800 940-20-4200= = = =240065 8 7-180 160223= = = = =400 8 + 350 3208+4 270 39= = = = =630 9+ 20 80+32 6 30069= = = = =（6900-20） 5 (729)(6） 4 9 = = = = =280 08157 (23-17) = = =24+221 23+410 40+14 = = =147+728 420 804= = = 1205 20369 3+4= = = =8987 65+74 2+4= = = 62 7765 8722= = = =100-505 3535 302+02 = = = =083 40+105 434+25 = = = = =6- 648456 60604= = = = 57-486 427+36 7418= = =
