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Foldables for the real number system
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Real Number System Foldable
This Idea came from Dinah Zike's Foldables. Directions were revised by Jamal Hutchinson,
Numeracy Coach Johnson/Baxter ALC, original by Barbara Broadway, Math Mentor at
Maplewood High School
Materials
Materials Pre-Cut
Dark Green 8 ½ in. x 11 inYellow 8 ½ in. x 5 ½ in.Bright blue 4 ¼ in. x 5 ½ in.Beige 4 ¼ in. x 5 ½ in.Orange 4 ¼ in. x 5 ½ in.Light green 4 ¼ in. x 5 ½ in.Pink 4 ¼ in. x 5 ½ in.
Types of Folds
Hot dog fold light green
Cut a window by cutting a ½ in from bottom to a ½ in to the long side to a ½ in from the top.
Stop cutting. Don’t cut across on the top.
Hot dog fold orange
Cut a window by cutting a ½ in from bottom to a ½ in to the long side to 1 in from the top.
Stop cutting. Don’t cut across on the top.
Hamburger fold yellow sheet.
Cut a window by cutting a ½ in from bottom to a ½ in to the long side to a ½ in from the top.
Stop cutting. Don’t cut across on the top.
Assembly
Slightly hamburger and hotdog fold the dark green sheet
Center the pink sheet on the left side paper
Slightly hamburger and hotdog fold the dark green sheet
Center the light blue sheet on the right side paper
Apply glue around the edges of the pink rectangle and lay the beige rectangle on it so that it opens from bottom to top.
Apply glue around the edges of the beige rectangle and lay the orange rectangle on it so that it opens from bottom to top.
Apply glue around the edges of the orange rectangle and lay the light green rectangle on it so that it opens from bottom to top.
Apply glue around the edges of the rectangle made up of the light green and bright blue rectangle
No glue down the middle where they join
Lay the yellow rectangle on them so that it opens from bottom to top.
Label
Pink: N = Natural Numbers or Counting Numbers 1,2,3,4…
Beige: W = Whole Numbers 0,1,2,3….
Orange: Z = Integers …-3,-2,-1,0,1,2,3…Light green: Q = Rational Numbers a/b a and
b Z, b = 0
Bright blue Ir = Irrational Numbers non-terminating and non-repeating decimals, pi, square roots of non perfect squares, pattern decimals, golden ratio.
Yellow: R = Real Numbers
All colors can be changed for another color.
Only thing that matters is the folds and cuts.