1、610-(21+29) 25(22+263) 80(32+8)300 3000-(32+8)30 30169-(60+9) 320-(120+254) 36(3+6)2 180(3612)+6 45015+103 (40+18030)2 (240+180)(302) 800-8008030 800-(706+180) 65(40+203) 36+36012 5121+795 456+356 675-375 398-639 32678-32668 12090-11090 527+635 655+355 2063-1284 649-149 23134-3423 6848+6852 7932+796
2、8 67101-67 2567-567 (75255)40 280025480 (380804) 60 6550+3550 270+3870 4(2565+2528) 125474725 340(120408) 45(720195719) 86+4500+(208836)2 120-36418+35 (58+37)(64- 95) .(8020+80)4 360(126 )5 10+(135-72)7 288(2614)8 5006-(502-80) (10512 635) 25 864(2723)12 (453816)24 500(240386) 64(8742) 15 (845153 )1
3、6 12(4928)7 450(8448 )12 (58+37)(64-95) 95(64-45) 5 178-14556+42 812-700(9+3111 ) 85+14(14+20826) (284+16)(512-820818) 120-36418+35 (58+37)(64- 95) 28(2466-32) 340-240205 (58+12) (968) 36427 3 (13525)406 18(7958 ) 27 (33889-19)34 (640+75015 ) 15 (72-57 )38 892-( 9056 2) 69(800 700)5 254+320 85+324 813+311 (482-42)22-17 16812-4812 18213+20813 52521-37821 3256-6 48+426-12 60-(303+3) 3113-22819 (15622432)80 345(128- 5319) 776-( 736152 ) 802+1005 45-2034 140-205+25 2030+2040 25(30+10) 80040-40040 600(12060) (26+14)70 (26+14)(70-40) 90(301550) (35+45)(90-10)