The 100 most important bills - part 2
Supplementary calculations in number range 20
Card index for lightning arithmetic
Complete with learning box
Please note:
Montessori materials are NOT toys, but educational materials. Proper use requires appropriate training.
Montessori materials may contain small, rough, sharp, or other elements that could cause injury or damage if used improperly.
It may therefore only be used by children under the supervision of appropriately trained persons and in an appropriate environment.
This card index is intended for flash calculation. The pupils should be able to calculate the invoice on the front at a glance (flash calculation). The back serves to trace the invoice. Lightning arithmetic is important to increase the speed of the arithmetic. A sample can be found in the appendix.
ISBN 978-3-902577-67-2
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Supplementary calculations in number range 20
Card index for lightning arithmetic
Complete with learning box
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