六年级解比例及解方程练习题.doc

人教版六年级解方程及解比例练习题解比例:x:10=: :x=:2 =:=:x :4=x:8 :x=3:12:=x: = =x: =6: = 45:x=18:26:=x: :x=: :=x:x:24= : 8:x=:=x: 064x 6x x x x1050x40 x20 x618 x 解方程X X= 2X + = 70%X + 20%X = X=20 25% + 10X = X - 15%X = 68XX121 5X3 X126X5 = 3X= X= XX= 4X6=2X= X = X = X = 4x3 9 = 29 x + x = 4X21=4 6X5 = X-X= 4638 X=12 X= 5X= X= X= X= X= = =30% 4+=102 X+X=42 X+X=105 X-X=400 =8 = X+X=18 X( + )= x= x+=4 XX125 X58 5- x = (x- = 7 x- 25%x = 10 x- = 16+6 20 x = x- x -4= 21 X25%X=90 XX= X X= 2X + = 70%X + 20%X = X=20 25% + 10X = X - 15%X = 68 XX121 5X3 X12 6X5 = 3X= X= XX= 4X6=2 X= X = X = X = 4x3 9 = 29 x + x = 4 X21=4 6X5 = X-X= 4638 5X= X= X= X=12 X= X= X= = =30% 4+=102 X+X=42 X+X=105 X-X=400 =8 = X+X=18 X( + )= x= x+=4 XX12 5 X58 5- x = (x- = 7 x- 25%x = 10 X25%X=90 x- = 16+6 20 x = x- x -4= 21 XX= X X= 2X + = 70%X + 20%X = X=2025% + 10X = X - 15%X = 68 XX121 5X3 3X= X= XX= 4X6=2 X= X = X = X = 4x3 9 = 29 x + x = 4 X21=4 6X5 = X-X= 46385X= X= X=X=12 X= X=X= = =30% 4+=102 X+X=42 X+X=105X-X=400 =8 = X+X=18 X( + )= x= x+=4 XX12 5 X585- x = (x- = 7 x- 25%x = 10x- = 16+6 20 x = x- x -4= 21 计算下面各题，能简算旳要简算. 3 5 4 （+ ） 5 （+）27 6 （） （ ） （7 ） + + 6 621 37 24 （+ 7 ） 25 + 1 + （5 ） 12（+ + ） （125 34） （+ ）7 5 199 （24 + ） 78+ 25