1、计算:
(9)-3-4+19-11; (10)-8+12-16-23; (11)-4.2+5.7-8.4+10;
(12)6.1-3.7-4.9+1.8; (13)121521-+1; (14)-++-; 33
(15)-216-157+348+512-678; (17)-4
23+11112-171174-218;
(19)12-(-18)+(-7)-15;
(21)4.7-(-8.9)-7.5+(-6);
(23)-413?713; (24)512-10.8;
4632 (16)81.26-293.8+8.74+111; (18)2.25+33534-1212-88;
(20)-40-28-(-19)+(-24)-(-32);
(22)-23+(-1116)-(-4)-2; (25)0.12-0.54-320;
2513(26)-4.72+16.42-5.28 (27)3?; (28)?; (?2)(?)7734
(29)(?3)?(?2); (30)(?1.2)?(?1) (31)23-17-(-7)+(-16)
143415 (32) (34)(-4
123?1??1?(36) -3.4+4.7-8.35; (37)?? (38)0.5???????2.75?????
755?4??2?112+(-)-1+ (33)(-26.54)+(-6.4)-18.54+6.4
5331711)-(-5)+(-4)-3 (35)(+6.1)-(-4.3)+(-2.1)-5.7
8824
(39)0.36+(-7.4)+0.3+(-0.6)+0.64; (40)9+(-7)+10+(-3)+(-9);
答案:(1)-5 (2)3 (3)-15 (4)-4 (5)-8 (6)-2 (7)-11 (8)1 (9)1 (10)-352 (11) 3.1 (12)-0.7 (13) (15)-191 (16)-92.8 (17)-22
23 (14) 341917 (18)-14 (19) 8 (20)-41 (21)0.1
2418145(22)-1 (23)3 (24)-5.3 (25)-0.57 (26)6.42 (27) ; (28)?;
1271213(29)?6; (30)0 (31)-3 (32)- (33)-45.08 (34)-6 (35)2.6
5412 (36) -7.05; (37) ; (38)3.5 (39)-6.7; (40)0;
35答案:(1)-5 (2)3 (3)-15 (4)-4 (5)-8 (6)-2 (7)-11 (8)1 (9)1 (10)-352 (11) 3.1 (12)-0.7 (13) (15)-191 (16)-92.8 (17)-22
23 (14) 341917 (18)-14 (19) 8 (20)-41 (21)0.1
2418145(22)-1 (23)3 (24)-5.3 (25)-0.57 (26)6.42 (27) ; (28)?;
1271213(29)?6; (30)0 (31)-3 (32)- (33)-45.08 (34)-6 (35)2.6
5412 (36) -7.05; (37) ; (38)3.5 (39)-6.7; (40)0;
35答案:(1)-5 (2)3 (3)-15 (4)-4 (5)-8 (6)-2 (7)-11 (8)1 (9)1 (10)-352 (11) 3.1 (12)-0.7 (13) (15)-191 (16)-92.8 (17)-22
23 (14) 341917 (18)-14 (19) 8 (20)-41 (21)0.1
2418145(22)-1 (23)3 (24)-5.3 (25)-0.57 (26)6.42 (27) ; (28)?;
1271213(29)?6; (30)0 (31)-3 (32)- (33)-45.08 (34)-6 (35)2.6
5412 (36) -7.05; (37) ; (38)3.5 (39)-6.7; (40)0;
35答案:(1)-5 (2)3 (3)-15 (4)-4 (5)-8 (6)-2 (7)-11 (8)1 (9)1 (10)-352
2317 (14) (15)-191 (16)-92.8 (17)-22 3418191(18)-14 (19) 8 (20)-41 (21)0.1 (22)-1 (23)3 (24)-5.3 (25)-0.57
2412451(26)6.42 (27) ; (28)?;(29)?6; (30)0 (31)-3 (32)- (33)
5712123-45.08 (34)-6 (35)2.6 (36) -7.05; (37) ; (38)3.5 (39)-6.7; (40)0;
435(11) 3.1 (12)-0.7 (13)