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1、有理数混合运算训练题 1计算: (105=50) (1)328-476+121-43; (2)275-261-343+132; (3)42(-121)-143(); (4)(-48) 82-(-25) (-6)2; (5)-52+(1276185). (6)-23153(-131)2(132)2; (7) -14- () 31(21)2-(21)3; (8) -1211-3(-32)2-( 41)2(-2)3(-43)3 (9)+ 101-22+(-3)2-32178; (10)32+(-2)3+ 624. ( 11 ) -32-;)3(18)52()5(223 ( 12 ) 1+3)43(4
2、1 (-2)4 (-5 . 043101); (13)5-3-2+4-3(-2)2-(-4) (-1)3-7. (14) (-4)x4+(-9)x2 (15) (-1)x(-6x) (16)9x(-7) (17)2x(-7)x(-3) (18)-7-(-6)x(-1) (19) 39+-23+0+-16 (20)-18+29+-52+60 (21)-3+-2+-1+0+1+2 (22)-301+125+301+-75 (23)-1+-1/2+3/4+-1/4 (24)-7/2+5/6+4/5+19/6 (25)+ (26)+-17/5+-1/8+ (27) (28)(-1 )-1 +(-2 )-(-3 )-(-1 )+4 (29) |-2 |+|-(+|-|-(7 )| (30)2311524 ()3461224 参考答案 1 (1) (2)-121; (3)-14; (4)-181; (5) (6)-351 (7)-1161; (8)- 5437; (9)1; (10)-624.(11)-31; (12)-8;2719 (13)224 (14) -34 (15) 3 (16)68 (17)252 (18)-13 (19) 0 (20)19 (21)-3 (22)50 (23)-1 (24) (25)-8 (26)-3 (27) (28)3 (29)-6(30)27