六年级解方程及解比例练习题.doc

六年级解方程及解比例练习题4.24x1.8 x =20 5x3 x - 15% x = 68 x = 0.24x1.8=4.2 x = x21=4 x=12 3.6x22.16 6 x5 =13.4 3x50.3=4.5x -x = 4 x638 5 x = x = x= x = x + x = 4 x x12x -25% x=10 xx = x = 4x3 9 = 29 x0.25= 4+0.7x =102 x + x =42 4x6=2 x = 9x 0.79 8.84 x =40 x12 3x = x= 70%X+20%X = 3.6 xx121 25% + 10 x = x - 0.8 x = 16+6 x x4= 21 20 x 8.5= 1.5 x25% x =90 (x-32) 5=115 xxx = 2x + =解比例:x:10=: 0.4:x=1.2:2 =:=:x 0.8:4=x:8 :x=3:121.25:0.25=x:1.6 = =x: =6: = 45:x=18:262.8:4.2=x:9.6 :x=: 2.8:4.2=x:9.6 x:24= : 8:x=:=x: 0642.4x 6x x x x0.71050x40 1.3x5.220 x3.6618 x 解方程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= X X= 2X + = 70%X + 20%X = 3.6 X=2025% + 10X = X - 15%X = 68 XX121 5X3 X12 6X5 =13.4 3X= X= XX= 4X6=2 X= X = X = X = 4x3 9 = 29 x + x = 4 X21=4 6X5 =13.4 X-X= 4638 5X= 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 X2.458 0.365- x = (x- 4.5) = 7 x- 25%x = 10 X25%X=90 x- 0.8x = 16+6 20 x 8.5= 1.5 x- x -4= 21 XX= X X= 2X + = 70%X + 20%X = 3.6 X=20 25% + 10X = X - 15%X = 68 XX121 5X3 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