It is generally accepted by mathematics educators and by scientific calculator companies that in the “correct” order of arithmetic operations, multiplication and division are done from left to right. Thus, 48÷4×12 is evaluated as 144. The Casio fx-82MS and the Casio fx-350ES shown above give this answer. There is, however, some disagreement whenever parentheses are used to indicate multiplication.
My daughter’s high school teacher asked her to evaluate 48÷4(12). My daughter’s answer was 144; her teacher’s answer was 1. What answer is given by the calculators?
Continue reading “Order of operations”
My wife and I currently have eight Hot Wheels Volkswagen Beetles: Herbie and the Treasure Hunts and the six shown here.
Continue reading “Volkswagen Beetles”
As I was writing this blog post, I was surprised to realize that I had not yet blogged about the Hot Wheels Volkswagen Beetles my wife and I have collected (except for Herbie). This afternoon, I saw three of these Volkswagen Beetles from 2015 and I bought one of them. While I was eating lunch, I was surprised to find a circle flame logo on the front of the card behind the scale model. Although I regularly look for the circle flame logo on the scale models (which the newer regular Treasure Hunts have), I did not see it on the hood of the car.
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I recently bought a Batman Live Batmobile in black and a pinstriped “1989 Batmobile” with a “black mirror” body. (It may not be obvious from my photograph, but the black mirror paint is sort of like what you get when you mix pewter with motor oil: a rainbow effect.) Both have yellow tinted windows.
My friend Dennis from Australia gave me the Hot Wheels Year of the Goat 2015 car shown above left. I understand that it is exclusively available from Toys R Us. The Carbonic shown above right is a recent acquisition. Continue reading “Carbonic: Year of the Goat”