有理数加减法计算题

有理数是能够用分数来表示的数，其实加减和以前学过的差不多，也就几种情况
可以这样看：

先确定符号

加法：
①正数+正数=正数
②负数+负数=负数
正数的绝对值大于负数的绝对值那么：
③正数+负数=正数
正数的绝对值小于负数的绝对值那么：
④正数+负数=负数
减法：
①正数（大）-正数（小）=正数
②正数（小）-正数（大）=负数
③正数-负数=正数
④负数-正数=负数
⑤负数（绝对值大）-负数（绝对值小）=负数
⑥负数（绝对值小）-负数（绝对值大）=正数
注：绝对值是把这个数前面的符号换成正号
例：-1的绝对值是1
-123的绝对值是123

确定符号后，再用大的绝对值，减去小的绝对值（不论前后），再加上符号就行了。

你只要多练就能很熟练了，我相信你一定行的~

==希望我的答案能帮到您==

45-17) (9-3)=28 6=34, (45-17) (9-6)=28 3=31, (45-18) (9-3)=27 6=33
(45-18) (9-6)=27 3=30, (45-27) (9-3)=18 6=24, (45-27) (9-6)=18 3=21
(45-28) (9-3)=17 6=23, (45-28) (9-6)=17 3=20, (46-17) (8-3)=29 5=34
(46-17) (8-5)=29 3=32, (46-19) (8-3)=27 5=32, (46-19) (8-5)=27 3=30
(46-27) (8-3)=19 5=24, (46-27) (8-5)=19 3=22, (46-29) (8-3)=17 5=22
(46-29) (8-5)=17 3=20, (54-16) (9-2)=38 7=45, (54-16) (9-7)=38 2=40
(54-18) (9-2)=36 7=43, (54-18) (9-7)=36 2=38, (54-36) (9-2)=18 7=25
(54-36) (9-7)=18 2=20, (54-38) (9-2)=16 7=23, (54-38) (9-7)=16 2=18
(57-18) (6-2)=39 4=43, (57-18) (6-4)=39 2=41, (57-19) (6-2)=38 4=42
(57-19) (6-4)=38 2=40, (57-38) (6-2)=19 4=23, (57-38) (6-4)=19 2=21
(57-39) (6-2)=18 4=22, (57-39) (6-4)=18 2=20, (63-15) (9-2)=48 7=55
(63-15) (9-7)=48 2=50, (63-18) (9-2)=45 7=52, (63-18) (9-7)=45 2=47
(63-45) (9-2)=18 7=25, (63-45) (9-7)=18 2=20, (63-48) (9-2)=15 7=22
(63-48) (9-7)=15 2=17, (64-25) (8-1)=39 7=46, (64-25) (8-7)=39 1=40
(64-29) (8-1)=35 7=42, (64-29) (8-7)=35 1=36, (64-35) (8-1)=29 7=36
(64-35) (8-7)=29 1=30, (64-39) (8-1)=25 7=32, (64-39) (8-7)=25 1=26
(67-18) (5-2)=49 3=52, (67-18) (5-3)=49 2=51, (67-19) (5-2)=48 3=51
(67-19) (5-3)=48 2=50, (67-28) (5-1)=39 4=43, (67-28) (5-4)=39 1=40
(67-29) (5-1)=38 4=42, (67-29) (5-4)=38 1=39, (67-38) (5-1)=29 4=33
(67-38) (5-4)=29 1=30, (67-39) (5-1)=28 4=32, (67-39) (5-4)=28 1=29
(67-48) (5-2)=19 3=22, (67-48) (5-3)=19 2=21, (67-49) (5-2)=18 3=21
(67-49) (5-3)=18 2=20, (72-14) (9-3)=58 6=64, (72-14) (9-6)=58 3=61
(72-18) (9-3)=54 6=60, (72-18) (9-6)=54 3=57, (72-54) (9-3)=18 6=24
(72-54) (9-6)=18 3=21, (72-58) (9-3)=14 6=20, (72-58) (9-6)=14 3=17
(73-14) (8-2)=59 6=65, (73-14) (8-6)=59 2=61, (73-19) (8-2)=54 6=60
(73-19) (8-6)=54 2=56, (73-54) (8-2)=19 6=25, (73-54) (8-6)=19 2=21
(73-59) (8-2)=14 6=20, (73-59) (8-6)=14 2=16, (81-24) (9-3)=57 6=63
(81-24) (9-6)=57 3=60, (81-27) (9-3)=54 6=60, (81-27) (9-6)=54 3=57
(81-35) (9-2)=46 7=53, (81-35) (9-7)=46 2=48, (81-36) (9-2)=45 7=52
(81-36) (9-7)=45 2=47, (81-45) (9-2)=36 7=43, (81-45) (9-7)=36 2=38
(81-46) (9-2)=35 7=42, (81-46) (9-7)=35 2=37, (81-54) (9-3)=27 6=33
(81-54) (9-6)=27 3=30, (81-57) (9-3)=24 6=30, (81-57) (9-6)=24 3=27
(83-14) (7-2)=69 5=74, (83-14) (7-5)=69 2=71, (83-19) (7-2)=64 5=69
(83-19) (7-5)=64 2=66, (83-24) (7-1)=59 6=65, (83-24) (7-6)=59 1=60
(83-29) (7-1)=54 6=60, (83-29) (7-6)=54 1=55, (83-54) (7-1)=29 6=35
(83-54) (7-6)=29 1=30, (83-59) (7-1)=24 6=30, (83-59) (7-6)=24 1=25
(83-64) (7-2)=19 5=24, (83-64) (7-5)=19 2=21, (83-69) (7-2)=14 5=19
(83-69) (7-5)=14 2=16, (86-27) (4-1)=59 3=62, (86-27) (4-3)=59 1=60
(86-29) (4-1)=57 3=60, (86-29) (4-3)=57 1=58, (86-57) (4-1)=29 3=32
(86-57) (4-3)=29 1=30, (86-59) (4-1)=27 3=30, (86-59) (4-3)=27 1=28
(91-24) (8-3)=67 5=72, (91-24) (8-5)=67 3=70, (91-27) (8-3)=64 5=69
(91-27) (8-5)=64 3=67, (91-34) (8-2)=57 6=63, (91-34) (8-6)=57 2=59
(91-37) (8-2)=54 6=60, (91-37) (8-6)=54 2=56, (91-54) (8-2)=37 6=43
(91-54) (8-6)=37 2=39, (91-57) (8-2)=34 6=40, (91-57) (8-6)=34 2=36
(91-64) (8-3)=27 5=32, (91-64) (8-5)=27 3=30, (91-67) (8-3)=24 5=29
(91-67) (8-5)=24 3=27, (92-34) (7-1)=58 6=64, (92-34) (7-6)=58 1=59
(92-38) (7-1)=54 6=60, (92-38) (7-6)=54 1=55, (92-54) (7-1)=38 6=44
(92-54) (7-6)=38 1=39, (92-58) (7-1)=34 6=40, (92-58) (7-6)=34 1=35
(93-15) (6-2)=78 4=82, (93-15) (6-4)=78 2=80, (93-18) (6-2)=75 4=79
(93-18) (6-4)=75 2=77, (93-75) (6-2)=18 4=22, (93-75) (6-4)=18 2=20
(93-78) (6-2)=15 4=19, (93-78) (6-4)=15 2=17, (94-16) (5-2)=78 3=81
(94-16) (5-3)=78 2=80, (94-18) (5-2)=76 3=79, (94-18) (5-3)=76 2=78
(94-76) (5-2)=18 3=21, (94-76) (5-3)=18 2=20, (94-78) (5-2)=16 3=19
(94-78) (5-3)=16 2=18, (95-27) (4-1)=68 3=71, (95-27) (4-3)=68 1=69
(95-28) (4-1)=67 3=70, (95-28) (4-3)=67 1=68, (95-67) (4-1)=28 3=31
(95-67) (4-3)=28 1=29, (95-68) (4-1)=27 3=30, (95-68) (4-3)=27 1=28