小学数学青岛版六年级上册分数四则混合运算专项练习题一、口算6= 36= = 30 = 2 = 18= ()24= 2025%= 0= 3= 15= 2-= 12%= 5= 75% = 4= 9999=4 = 6 = 6 6 =( )16= 1 = = 24%5=二、计算下面各题,能简算的要简算。30() ()8 ()()24 6 () () ()() () ()883 1348() 45 99()() 7 【1()】 ()12 2 ()() 50.12 +4() 48( 2) 23 8+ +3 887 11 5【( ) 】 23 67 1() ()2 ( ) 4( )6 15 ( 6 32 ) ( )15-2 ( ) +3 75+2525% + 2.8()(-) 3、解方程XX= X=15 40%X-=3 X = X = 6= 0.7=2.1X + 20 X = 24 4x+2=29 38x-27=15x+ x=35 7x =