Ever wonder about the abacus? This venerable classic is surprisingly easy to use. Check out this brief demo on various abacuses.
Use a Abacus
Lawrence Perez, from Saddleback College, and his assistant Charlie, give this arithmetic lesson on adding with an abacus. Who needs an electronic calculator anyway?
Lawrence Perez, from Saddleback College, and his assistant Charlie, give this two-part arithmetic lesson on subtracting with an abacus. Could this be any easier than adding? Maybe, can you "borrow" the knowledge to subtract these numbers without an electric calculator? See for ...more
Teach your kids about the ancient Chinese abacus, often used as a counting tool, with the help of a fun arts & crafts project! In this Simple Kid's Crafts tutorial, learn how to construct a Chinese abacus for fun with your kids. This is the perfect project for children ages ki ...more
Before we had the calculator and before we had the abacus we had the human brain to complete our math problems for us. Remember that? Well, it seems that few of us do, resorting to calculators on our phone for elementary subtraction problems and multiplication. Strengthen you ...more
Before the calculator and even the abacus was invented, there was a little instrument called the human brain that we used to do math. Remember that? While most of us turn to our trusty Ti-84s to do calculus homework or whip out our cell phone calculators to determine how much ...more
Chopsticks are very easily reusable, yet they always get thrown away. You use them when you get Chinese takeout, then toss them out without even a backwards glance. Next time, you should consider recycling them, because with a bit of creativity you can turn those old chopstic ...more
...his easy laugh and southern charm. Pull this trigger...it is just so electric. Not just the spark, but the 50,000 volts cursing through the tumid chamber, filled with liquid soluble polydimethalsiloxane. Okay. Okay. Maybe it did not go exactly like that. Maybe all the ...more
Lawrence Perez, from Saddleback College, and his assistant Charlie, give this arithmetic lesson on adding with an abacus. Who needs an electronic calculator anyway? Well, these are some pretty big numbers. If you're scared of all things not-electronic, then stay away.
This video presents a mathematical puzzle which is to be solved by the viewer. The solution is posted in an alternate video, but this video presents the problem of a four digit number which is the square of a smaller number. The first two digits of the square are the same as e ...more