小学六年级数学解方程复习题.doc

(1)+2.4=6 (2)3.5: =5:4.2(3)1.8=2.4 (4)=(5)631.8=7.2 (6)175=2.4+3 (7)= (8) =(9)12.62=8 (10)= (11)= (12) +50%=42(13)413=31 (14)4.5+8=27(15)2+4.33=14 (16) (1)1（17） （18）342.5（19） （20）1.6：（21）3163102 （22）x：1：（23）47.112.5 （24）：0.6：4（25）：: (26) 0.329.1(27) (28)x(29) : : (30): :(31)3+2 (32):0.3: (33)13189.2 (34):0.2580: (35)47.112.5 (36)(37) (38):12(39) = (40) :=12:3(41)2.40.452=0.3 (42):=:0.1(43)6.35=4.1 (44)1.25:5=0.75:(45):=:6 (46)2.5=0.6(47) = (48): =:(49)= (50)+1.2=3.4(51)4:6=15: (52):=:(53)X X= 2X + = 70%X + 20%X = 3.6X=20 25% + 10X = X - 15%X = 68XX121 5X3 X126X5 =13.4 3X=X= XX= 4X6=2 X= X = X = X = 4x3 9 = 29 x + x = 4X21=4 6X5 =13.4 X-X= 46385X= X= X=X=12 X= X=X= X-0.25= =30% 4+0.7X=102 X+X=42 X+X=105 X-X=400 X-0.125X=8 = X+X=18 X( + )= x0.375x= x+=4 XX12 5 X2.4580.365- x = (x- 4.5) = 7 x- 25%x = 10x- 0.8x = 16+6 20 x 8.5= 1.5 x- x -4= 21 X25%X=90 XX= (0.5+x)+x=9.82 2(X+X+0.5)=9.8 25000+x=6x3200=450+5X+X X-0.8X=6 12x-8x=4.8 7.5x2X=15 x-0.7x=3.6 3x816 7(x-2)=2x+3 18(x-2)=270 12x=300-4x 7x+5.3=7.4 30x+25=85 1.48-2x=6 6x-12.83=0.06 3(x+0.5)=21 53-x2=8 x0.756=90 x5+9=21 48-27+5x=3110.5+x+21=56 x+2x+18=78 (200-x)5=30 (x-140)70=4 0.1(x+6)=3.30.4 4(x-5.6)=1.6 32y-29=3 5x+5=15 89x-9=80 100-20x=2055x-25x=60 76y-75=1 23y-23=23 4x-20=080y+20=100 53x-90=16 2x+9x=11 12y-12=2480+5x=100 7x-8=6 65x+35=100 19y+y=4025-5x=15 79y+y=80 42x+28x=140 3x-1=8 90y-90=90 80y-90=70 78y+2y=160 88-x