(1)3-8;(2)-4+7;(3)-6-9;(4)8-12;
(5)-15+7;(6)0-2;(7)-5-9+3;(8)10-17+8;
(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)
(15)-216-157+348+512-678;(16)81.26-293.8+8.74+111; (17)-4
121521-+1;(14)-++-; 334632211117353+1-17-2;(18)2.25+3-12-8; 3124184128
(19)12-(-18)+(-7)-15;(20)-40-28-(-19)+(-24)-(-32);
2111+(-)-(-)-; 3642(21)4.7-(-8.9)-7.5+(-6);(22)-
1113(23)-47; (24)5-10.8; (25)0.12-0.54-;
33202
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
211(32)+(-)-1+ (33)(-26.54)+(-6.4)-18.54+6.4
353 (34)(-4
7111)-(-5)+(-4)-3(35)(+6.1)-(-4.3)+(-2.1)-5.7 824812311(36) -3.4+4.7-8.35; (37) (38)0.52.75
75542
(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
23(14) 341719(15)-191(16)-92.8(17)-22(18)-14(19) 8(20)-41(21)0.1
182414(22)-1 (23)3 (24)-5.3 (25)-0.57 (26)6.42 (27) ; (28)
1275; 1213(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(8)1(9)1(10)-352(11) 3.1(12)-0.7(13)
答案:(1)-5 (2)3 (3)-15(4)-4 (5)-8 (6)-2(7)-11
23(14) 341719(15)-191(16)-92.8(17)-22(18)-14(19) 8(20)-41(21)0.1
182414(22)-1 (23)3 (24)-5.3 (25)-0.57 (26)6.42 (27) ; (28)
1275; 12(8)1(9)1(10)-352(11) 3.1(12)-0.7(13)
(29)6; (30)0 (31)-3 (32)- (36) -7.05; (37)
13 (33)-45.08 (34)-6 (35)2.6 5412; (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
23(14) 341719(15)-191(16)-92.8(17)-22(18)-14(19) 8(20)-41(21)0.1
182414(22)-1 (23)3 (24)-5.3 (25)-0.57 (26)6.42 (27) ; (28)
1275; 1213(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(8)1(9)1(10)-352(11) 3.1(12)-0.7(13)
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)-
231719(14) (15)-191(16)-92.8(17)-22(18)-14(19) 8(20)-41(21)0.1(22)341824145-1 (23)3 (24)-5.3 (25)-0.57 (26)6.42 (27) ; (28);(29)
1271213 (30)0 (31)-3 (32)- (33)-45.08 (34)-6 (35)2.6 (36) -6;
54127.05; (37); (38)3.5 (39)-6.7; (40)0;
350.7(13)
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