一、口算。结果请用最简分数表示。 1111214173+= -= -= -= -= 23245577881252113121+ = -= += -= += 105633584335591421111-= -= -= + = -= 12121010556328331143755+= -= += 1-= += 8825778665319355351-= += -= -= += 1252101077881713319193+= += += -= -= 612447210210558171913193 + = + = - = +998824243636 = 3411111123 + = - = - = -7788491313 = 84111311733 + + = 1- - = + + = - +911966444888 = +-= = -= += += -= 二、计算(能简算的要简算)。 53115311(1)8 -10 +4 (2)1-24 +48 (3)4 +25 -12 3215422332(4)55 -23 +36 (5)7 -15 +7 -15 (6)4 -﹙4 -3 ﹚ 1733411(7)2-8 -8 (8)+58 -34 (9)5 -4 +3 9337327135(10)10 +20 -15 (11)1-12 +4 (12)28 +﹙14 -7 ﹚ 527115511(13)26 -﹙3 +12 ) (14)154 -52 +76 (15)16 -﹙33 -12 ﹚ 1275312(16)+3 (17)++ (18)+- 8158643111173731(19)12 - ( 6 + 8 ) (20)11- 10 - 10 (21)12 - ( 4 - 2 ) 133421235154 -( - ) ++ ++ -+ 24847217513535531731713111581-- -(-) ++ 12 +4 +12 1216151818710101275317311111 - - ++ +- - ( + 10881268 ) 815864311- 7 310 -10 132 -(4 -38 ) 4582811 -(305 +811 ) +15 +4495 +9 (1)3x-1 =1566 (4)31-x=134 8 (7)X+27=23 7- ( 31 ) 13312 4 - 2 2 -(4 -8 ) 56 -(13 +310 ) 2513 +6 - 6 44+62371117 9 +57 +9 152 -35 -24 24-(757 ) 2139 +12124 -116 + (2)-x=2114 (3)43 +x=5 (5)3x-44355 =2-5 (6)X-4=8 (8)X -13126 =8 (9)5 +X=3 本文来源:https://www.wddqw.com/doc/2c49992a710abb68a98271fe910ef12d2bf9a973.html