Fun Arithmetic Decomposition Ruler, Children's Number Decomposition Ruler
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Description
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Children's number decomposer (decomposition ruler), early childhood mathematics teaching aid for kindergarten/lower primary school, used to learn number decomposition within 10 and addition and subtraction.
All edges of the model are smoothed to prevent scratches or pricks to hands!!!
How to use💡
1. Number decomposition: Slide the caliper to align with the target number, the sum of the top and bottom numbers equals the target number. Example: If the caliper is on number 7, then bottom 1 + top 6 = 7, meaning 7 can be decomposed into 1 and 6, 5 and 2, 4 and 3... and so on.
2. Addition practice: Fix a number on one side, slide the caliper, and intuitively calculate the sum of the two numbers
3. Subtraction practice: With the total number fixed and one addend known, quickly find the other difference
Installation method:
1. Print and arrange as shown in the figure
2. Align and install accessories labeled "2" and "4" into their respective holes as shown in the figure
3. Install accessory "1" into accessory "2" according to the pinhole and press firmly; install accessory "3" into accessory "4" according to the pinhole and press firmly (it is recommended to apply some super glue in the larger holes).
License
You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.
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