结果请用最简分数表示
21 +31 =21 -41 =52 -51 =74 -71 =87 -83 =101 +52 =65 -32 =31 +51 =83 -41 =32 +31 =125 -125 =109 -101 =54 -52 =61 +31 =21 -81=83 +83 =21 -51 =74 +73 = 1-87 =65 +65 =1-125 =53 +21 =109 -103 =75 -75 =83 +85 =61 +127 =41 +43 =73 +21 =109 -21 =109 -53 =59 +89 =18 +78 =1924 -1324 =1936 +336 =37 +47 =118-18 =14 -19 =1213 -313 =89 +411 +19 = 1 -16 -16 =34 +14 +14 =78 -38 +38 =+=-=+=-=+=-=二、计算(能简算的要简算)
(1)58 -310 +14(2)1-124 +548(3)34 +215 -112(4)535 -223 +316(5)57 -415 +27 -215(6)34 -﹙34 -23 ﹚(7)2-18 -78(8)4
75 +538 -334(9)45 -14 +13(10)910 +320 -315(11)1-712 +34(12)2728 +﹙1314 -57 ﹚(13)256 -﹙23 +712 ) (14)1514 -512 +756(15) 156 -﹙ 313 -112 ﹚(16)1
875 +23(17)81 +152 +87( 18)65 +43 -31( 19) 1112 - ( 16 +18 ) ( 20) 11 -710 -310( 21) 712 - ( 34 -12 ) 12 -(34 -38 )43 +75 +2154 +32 +5117