Digital Standard Abacus - 24.8 cm - Professional 13 - Column Soroban with Reset Button Calculator (Functional and Educational Tool)

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I previously got the 17-digit soroban from the same manufacturer, but it was a bit long, and how many numbers do I need to remember anyway? So I picked this one up as well.Something I wasn't expecting, but which makes this more comfortable to use, is that it is bigger - the beads are bigger and spaced slightly farther apart, and the overall thickness is greater.Here are some measurements: beads are 16 mm diameter, 8 mm thick, spaced on 20 mm centers. Or more to the point, appropriate for man-sized fingers.The rods are bamboo, and this may be just me, but the beads slide on them a little too easily, so it's easy to accidentally move beads. It also means that if you tilt the soroban at all while using it, you will lose your total. This is why 4 stars rather than five - there's no way to just hold this and use it; you have to have it sitting on a flat surface to have any hope of not losing track. It suggests to me that this is meant to be a decorative rather than practical instrument. The 17 digit soroban from the same manufacturer uses plastic rods, and while you still can't tilt it much, the beads on that one are better at staying where you put them.Another difference between this and other soroban I have seen, is the positions of the index marks on the reckoning bar. Most have marks at the third, sixth, ninth, and so on digits, and these represent the units, thousands, and millions digits, while leaving two digits for tenths and hundredths. On this model, though, the dots are positioned between digits, being a closer representation of the commas and decimal point in written notation, which makes sense to me.

I recently had a massive stroke, and I am constantly busy trying to work my brain, trying to bolster my memory. I'd heard the Soroban abacus had been proven to improve the brain and memory. I'm all in for this.

Hey everyone! It's your favorite Amazon reviewer, Sean 'The Tester' Chao, back again with a new product! Today we're looking at Black long Di Fang's Digital Standard Abacus.- Build: This product is decently made. The product is made from plastic. During our inspection, we did not identify any manufacturer defect or flaws in the overall product design. We assess that this product will last 2+ years with regular use.- Price: At the time of writing, this product is priced comparable to similar products on the market. The abacus niche is surprisingly saturated with competitors, and we noted that comparable products came in at both lower and higher price points. However, we note that this product differentiates itself with a manual one-touch reset button and a unique color scheme. For these reasons, we consider this product to be a decent value.- Function: This product works as intended. The abacus beads slide along the rods with no issue... in fact, we found that the beads have a habit of moving around while we used this abacus. Due to the beads not staying stationary, their small size, and light weight, we did not find this abacus to be extremely effective for any use beyond that of a novelty.- Aesthetics: Most competitors in this price class are, like this abacus, made entirely out of plastic. Although this abacus presents generally well, we do not like the plastic sheen of the abacus. This is inherently a tool, and this particular product is marketed as 'professional,' yet it looks and feels like a toy.Bottom line: This is an acceptable abacus. We do not think it should be labeled as 'professional,' and would be better served as an office desk novelty or learning tool for children. We do think that it is a worthwhile impulse purchase due to the very competitive and generally low price. We therefore generally recommend this for those looking for this type of product.This product earns the 'Sean's Satisfactory Seal.'**Seals are rated on this scale**Poor: No SealAverage: 'Sean's Satisfactory Seal'Good: "Sean's Superior Seal'Excellent: "Sean's Supreme Seal'

This is a great math learning tool for school-aged children. It is ready to use right out of the box, but I'm a little concerned about the strength of the bars and the potential choking hazard if beads come out, so I advise that they not be used in a household with toddlers and anyone who would put beads into their mouths if they got loose. Unlike the colorful and sturdy 10-beads-per-bar setup that I remember from my early education, this abacus is not a learning TOY per se. Rather, it is a learning TOOL, and a powerful one to boot. I like the low-tech reset button, but I question how that is any better than gravity or light finger slides. Maybe it is a time saver after it has been fully mastered, but right now it seems kind of unnecessary. The setup is clearly geared for 1:4 abacus education as each bar holds up to 5 beads, with computations above 5 separated by a bar. I have not mastered the 1:4 abacus technique, but I'm relieved to see many instructional videos online to help guide me and my child. My child loves math so this will be an exciting new math adventure for both of us. It would be a wonderful tool to help tactile and visual learners as it is ordered and consistent, but it does not have small manipulatives that can be easily lost compared to modern classroom math manipulative tools. This would be a great addition to a classroom or a child's low-tech calculator that is fascinating and engaging enough to help get them excited about math and identifying patterns. It is also a great starter to help visually impaired students learn and practice basic math computations.