(2 customer reviews)

Crazy Calculator, math magic at your fingertips

399.00 Original price was: ₹399.00.320.00Current price is: ₹320.00.
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The Crazy Calculator is a compact arithmetic machine (or adding machine) that works by moving gear racks, using a stylus included in the kit. By moving the sliding racks, marked with arrows and numbers from 0 to 9, you can add and subtract numbers.

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100 in stock

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Crazy Calculator, math magic at your fingertips

Original price was: ₹399.00.Current price is: ₹320.00.

Math Master, a multiplication machine

Original price was: ₹460.00.Current price is: ₹370.00.
For 2 item(s)

Crazy Calculator is a DIY wooden model kit based on an additor that was invented by a St. Petersburg music teacher, Heinrich Kummer, in 1846. Its simple design and compact size made it a popular mathematical tool in its time.

It is used to add and subtract numbers. To do this, the user enters a number value using the stylus, then uses the stylus to enter a second number. The device then shows the result of the desired mathematical operation, according to where the second number was entered (top row for addition, bottom row for subtraction). But this Calculator is not limited to addition and subtraction—you can also use it to multiply and divide.

Weight 0.4 g
Dimensions 30 × 22 × 5 cm

2 reviews for Crazy Calculator, math magic at your fingertips

  1. Nidhi

    Really amazing. Make your calculator on your own and it actually calculatesđź‘Ś

  2. Upasna

    Such a creative product… it really helped my kids do calculations so easily

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