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1. They also learned to use the abacus.
2. The abacus was the precursor of the modern electronic calculator.
3. Sometimes he calculates the price on an abacus and then indicates the total.
4. Once in a while, the numbers fall, the abacus clicks into a pattern.
5. Vassily Prokofyevich, the manager, was doing his accounts, snapping his abacus.
6. Make an abacus and write a report about its usefulness in terms of place value and computation.
7. The central volutes intertwine and a tendril and foliage breaks the line of the abacus between these and the angle volutes.
8. About twelve worshippers dotted the empty, evenly-spaced pews, like lonely beads on a child's abacus.
9. She gave him an abacus, explained the basic principles, and showed him how to make his trick work even better.
10. Vocabulary is words, lists of, abacus beads, each encapsulating a precise idea.
11. All of them will make either a slide rule or an abacus as a way of presenting how number sets work.
12. Nowadays, abaci are often constructed as a wooden frame with beads sliding on wires, but originally they were beads or stones moved in grooves in sand or on tablets of wood, stone,(http://Sentencedict.com) or metal.
13. The first abaci appeared in Sumerian and Babylonian times, were used by the Romans, but reached the height of their development in China from the 14th century AD onward.
14. Disposing welding section steel cross bridging in the slab-column system is a good means to avoid disposing abaci and elevating shear resistance.
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