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Props is one of the most important supporting tools in teaching and learning process, especially in learning mathematics, so that students can easily understand the material being taught. This time I want to give a little bit about the material analysis tools of integer debt operation called the "integer line". Hopefully useful for teachers in teaching calculation materials, such as addition and reduction of integers.

**Materials needed :**

- Bamboo
- Wood or Board
- Colored Paperboard / Manila Paper
- Foam or Styrofoam
- Glue or adhesive
- Marker

**Ways of making :**

- Wood cut lengthwise forming like a long ruler.
- Close and coat the surface of the wood by using the cardboard, then write the integers above it, and the zero number (0) (for example -15 to 15) is zeroed. Next put the writing of the integers on the wood using glue.
- As a buffer or pole, use two pieces of bamboo that are about the same size. to make it more appealing, decorate the bamboo with color paper, write it on the left bamboo "Negative" and bamboo right "Positive".
- Then cut the foam / styrofoam on the car or person, then as a hint, stick also the arrow from the paper to the car body or the puppets.

How it works is as follows:

- Every will perform the demonstration, all starting from the middle or from zero (0).
- If the first number in a counting operation is a positive number, then the tip of the arrow is directed to the right or toward the positive number and moves forward. Conversely, if the first number is a negative number, then the tip of the arrow is directed to a negative number or directed to the left.
- If the calculation operation is the sum, then it is pointed to the right of the zero, while if the subtraction operation, it is directed to the left of the number zero.

#steemiteducation

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@good-karma
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