Strip boards for addition and subtraction

Strip boards for addition and subtraction

€43.73
Tax excluded

Strip boards for addition and subtraction in a set, Montessori material for the transition between ten

The strip boards for addition and subtraction are very clear Montessori material for teaching mathematics. In particular, the tens transition, with which many elementary school students are at war, suddenly becomes child's play thanks to the geometric representation of the tasks. If the tens transition on a tens (10) is understood, the technique is used in the same way for all subsequent tens (20, 30, 140, ...). Wooden strips of different lengths function as numbers, which are added to or subtracted from one another. In this way, the visual assessment of proportions is also trained.

Application, advantages, areas of application for this Montessori material:

    • Experience the transition of ten in the addition

    • Learn the transition of ten in subtraction

    • Montessori material for children from 6 years



Extent of the Montessori arithmetic material:
1 addition board, wood, approx. 41 x 28 cm
1 subtraction board, wood, approx. 41 x 28 cm
18 red stripes, wood, each width: 2 cm, length varies depending on the numerical value
18 blue stripes, wood, Width each: 2 cm, length different for each numerical value
17 control strips, wood, width each: 2 cm, length different for each numerical value


Instructions for the stripboard for addition


An adult takes the board and puts it in front of him. Now he takes the stripes and puts the blue stripes on the left of the board and the red stripes on the right.
It is advisable to lay the strips down one after the other (9 above, 8 below ....... 1 below).

Simple calculations can now be submitted. He starts in the top row of the board and places, for example, the blue strip of 4 and next to it the red strip of 5. The result can be seen above.
4 plus 5 is nine.
The invoice can be placed underneath in reverse order (5 stripes blue + 4 stripes red). 5 + 4 = 4 + 5
After the introduction, it is handed over to the child.

Variations:
Task cards can be created that contain the solutions on the reverse for checking purposes.

Which strips do we have to put together in order to always get 10 as a result?

1 (blue) +1 (red) The double of one is two
2 (blue) +2 (red) The double of two is four .....


Instructions for the stripboard for subtraction


An adult takes the board and puts it in front of him. Now he takes the strips and puts the red strips on the left side of the board and the blue strips on the right side.
It is advisable to lay the strips down one after the other (9 above, 8 below ....... 1 below).

First work with the red stripes.



For example, the adult presents the bill 8-3. He places the red 3 stripes under the eight printed on the board, in such a way that the end of the stripe is exactly in the box under the 8. The result can now be read. 8-3 = 5
This exercise is carried out until the child becomes more confident.

Now the blue stripes are added.
For example, the adult places 2 (red) +6 (blue). Now he pulls away the blue stripe and says: 8 minus 6 is 2

variations:
Now the blue stripes are added.
For example, the adult places 2 (red) +6 (blue). Now he pulls away the blue stripe and says: 8 minus 6 is 2

task cards can be created that contain the solutions on the back for checking purposes.

SBAS31672021

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