有理数加减法计算题(含答案)
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;
(15)-216-157+348+512-678; (17)-4
23+111117
12-174-218
;
(19)12-(-18)+(-7) -15;
(21)4. 7-(-8. 9) -7. 5+(-6) ;
(13)13-23+1; (14)-15214+6+3-2
; (16)81. 26-293. 8+8. 74+111; (18)2. 25+334-12512-838; (20)-40-28-(-19)+(-24) -(-32) ;
(22)-23+(-111
6) -(-4) -2
;
1113
(23)-4+7; (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)
1
43415
(32) (34)(-4
123⎛1⎫⎛1⎫
(36) -3. 4+4. 7-8. 35; (37)-+ (38)0. 5+ -⎪-(-2. 75)+ +⎪
755⎝4⎭⎝2⎭
7111
) -(-5)+(-4) -3 (35)(+6. 1) -(-4. 3) +(-2. 1) -5. 7 8248211
+(-) -1+ (33)(-26. 54)+(-6. 4) -18. 54+6. 4 353
(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) 34
1917
(18)-14 (19) 8 (20)-41 (21)0. 1
2418
145
(22)-1 (23)3 (24)-5. 3 (25)-0. 57 (26)6. 42 (27 ; (28)-;
12712
13
(29)-6; (30)0 (31)-3 (32)- (33)-45. 08 (34)-6 (35)2. 6
54
12
(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) 34
1917
(18)-14 (19) 8 (20)-41 (21)0. 1
2418
145
(22)-1 (23)3 (24)-5. 3 (25)-0. 57 (26)6. 42 (27 ; (28)-;
12712
13
(29)-6; (30)0 (31)-3 (32)- (33)-45. 08 (34)-6 (35)2. 6
54
12
(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) 34
1917
(18)-14 (19) 8 (20)-41 (21)0. 1
2418
145
(22)-1 (23)3 (24)-5. 3 (25)-0. 57 (26)6. 42 (27 ; (28)-;
12712
13
(29)-6; (30)0 (31)-3 (32)- (33)-45. 08 (34)-6 (35)2. 6
54
12
(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 3418
191
(18)-14 (19) 8 (20)-41 (21)0. 1 (22)-1 (23)3 (24)-5. 3 (25)-0. 57
2412
451
(26)6. 42 (27) ; (28)-;(29)-6; (30)0 (31)-3 (32)- (33)
5712
123
-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)