Simple exercise different result, can you explain it?

Simple exercise different result, can you explain it?

A science girl (that's the nickname on Twitter) published a short video today (Tuesday) that received more than 37 million views. In the video you see a cell phone device and a calculator appears on the screen, next to the cell phone is a regular real calculator.

The video shows the execution of a simple arithmetic exercise 50+50X2 performed on both the phone calculator and the real calculator, but the results obtained were different. On the phone calculator the result was 150, while on the real calculator the result was 200. “Can you explain the different results?” story. Which sparked thousands of responses from surfers trying to understand the difference between the two calculators.

The professional explanation for this is related to the order of operations of the correct account. When calculating arithmetic exercises, there is a defined order of operations according to which the various operations must be performed and it must be performed in the following order: parentheses, powers, multiplication/division and addition/subtraction.

In the 50+50*2 exercise, the first operation to be performed in the correct order is the multiplication (50*2=100) and only then the addition (100+50=150). Therefore, the correct result of the exercise is 150. In the phone calculator, the correct order of operations was probably set, which led to the correct result of 150.

On the other hand, in the real calculator, an incorrect order of operations was probably defined that first performed the addition and only then the multiplication, which led to the incorrect result of 200. The phenomenon photographed illustrates the importance of defining the correct order of arithmetic operations in digital calculators, in order to avoid calculation errors.

Below are additional examples of exercises in which different results are possible depending on the order of operations: 6÷2(1+2), 20-3*4/2, 12-4+3*2 and 40÷5+2*3. In all of them, there is one correct result according to the correct order of operations and there are other incorrect results if the operations are performed in a different order.

So in conclusion, who knows, maybe instead of buying the next smart calculator, you should leave the money for the math enrichment course for the lost digital calculators. Meanwhile, many people on Twitter are already proposing to initiate a campaign “Give calculators memory!” – Maybe it will help them remember that multiplication and division are just as important as addition and subtraction. Maybe we should just start using our brains a little more ourselves during the calculations – who knows, it might even be useful in the end!

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