images_of_pictures.zip is downloadable.

images_of_pictures.zip is uploaded.

You can use this graphic assets to make your original image patterns of numbers.

The resolution of this assets of the html5 version is quite low.

Because the size of the game should be reduced for the users of smart phones.

Users of ios version of this app can also use this assets too.

You can hide the images of beads of the abacus by choosing the hand image in the setting screen.

Today, I've added this graphic assets as a trial wishing to memorize numbers temporarily.

I guess it's a problem of short term memory and long term memory.

If you practice hard with these patterns of images, perhaps you can master mental calculation.