(一)1、计算: (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)121521-+1;(14)-++-; 334632(15)-216-157+348+512-678;(16)81.26-293.8+8.74+111; (17)-4211117353+1-17-2;(18)2.25+3-12-8; 3124184128(19)12-(-18)+(-7)-15;(20)-40-28-(-19)+(-24)-(-32); (21)4.7-(-8.9)-7.5+(-6);(22)-21+(-36)-(-11)-; 4211137; (24)5-10.8; (25)0.12-0.54-; 332022513(26)-4.72+16.42-5.28(27)3; (28); (2)()7734131(29)(3)(2); (30)(1.2)(1)(31)23-17-(-7)+(-16) 445211(32)+(-)-1+(33)(-26.54)+(-6.4)-18.54+6.4 3537111(34)(-4)-(-5)+(-4)-3(35)(+6.1)-(-4.3)+(-2.1)-5.7 8248(23)-4(36)-3.4+4.7-8.35; (37)12311 (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 1824145(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(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 1/2 23(14) 341719(15)-191(16)-92.8(17)-22(18)-14(19) 8(20)-41(21)0.1 1824145(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(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 1824145(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(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)-0.7(13) 2317191(14) (15)-191(16)-92.8(17)-22(18)-14(19) 8(20)-41(21)0.1(22)-1 (23)3 3418241245(24)-5.3 (25)-0.57 (26)6.42 (27) ; (28);(29)6; (30)0 (31)7121213-3 (32)- (33)-45.08 (34)-6 (35)2.6 (36) -7.05; (37); (38)3.5 5435(39)-6.7; (40)0; 2/2 本文来源:https://www.wddqw.com/doc/f5392868ab956bec0975f46527d3240c8447a1ba.html