Arithmetic learning tool

Abstract

As shown in the reference figures 1 to 3, this item is composed of nine pieces of paper. Specifically, it includes a "mounting board" with numbers from 1 to 100 written in a 10×10 grid pattern, and "sheets of multiples of 2", "sheets of multiples of 3", "sheets of multiples of 4", "sheets of multiples of 5", "sheets of multiples of 6", "sheets of multiples of 7", "sheets of multiples of 8", and "sheets of multiples of 9". When any "sheet of multiples" is placed on the "mounting board", windows (holes) are made in each "sheet of multiples" so that the answer of the multiplication can be known. For example, as shown in reference figures 4 and 5, when the "sheet of multiples of 3" is placed on the "mounting board", only the multiples of 3 are displayed. First, it can be used for practice by reciting while all the answers are visible, or by hiding the parts to be memorized with a finger or the like for practice, or by removing the number "mounting board" and reciting after thinking that it has been memorized. Also, by stacking multiple sheets, the common multiples can be known. For example, to know the common multiple of 3 and 7, as shown in reference figure 5, the "sheet of multiples of 3" should be stacked on the "mounting board", and further, as shown in reference figure 6, the "sheet of multiples of 7" should also be stacked.

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