The calculator says: €0.025. The bill says: €250. Which one do you believe? 100 children at the Science Center sit down at tables for a break. 100 juices are brought to the tables, one for each child. One juice costs €2.50. One of the students takes out a phone and opens the calculator to find out how much the 100 juices cost altogether. But instead of pressing ×, the student accidentally presses ÷. The screen shows: €0.025 The result seems strange, but the number is on the screen, so the student does not check again. Meanwhile, all 100 juices are already on the tables and the children start opening them. A few minutes later, the bill arrives: €250 The students look at one another. Someone immediately says there must be a mistake. The student takes out the phone again and checks what had been entered. Instead of pressing ×, the student had accidentally pressed ÷. One single wrong press had turned €250 into €0.025. And all 100 juices had already been opened. When a calculator gives you an answer, is it enough to see a number on the screen — or should you also ask whether the result makes sense and what its order of magnitude is? Functional illiteracy does not only mean failing to understand a text. Sometimes it also means seeing an absurd result on a screen and not realizing that it makes no sense. Where do you think the chain breaks: in the calculation itself, in understanding the result, or in the lack of a habit of checking the answer? #sabotage #PISA2025 #education #edu #pisa #pisastudie #MrNumberwise #English #20260910 #0058
