The altering curriculum makes mother and father spin like a pinwheel, if they do not replace their information commonly, it will likely be tough to information their youngsters. However generally the shaggy dog story comes from the creator, because the case of a guardian in China beneath is an instance.

Accordingly, Mr. Wang’s son is in 1st grade. At some point he got here residence from college with a take a look at that the trainer crossed out with the mistaken reply to the query requested by his father. The issue with the issue is as follows: “Mr A used 100 yuan to purchase an merchandise value 35 yuan. How a lot cash did Mr. A get again?”.

Within the take a look at, the boy recorded his reply as 100 – 35 = 65, that’s, taking the amount of cash that A introduced with him to subtract the worth of the bought merchandise. Nonetheless, the trainer didn’t acknowledge the reply, however crossed it out, not giving factors.

As an individual who values ​​the outcomes of his youngsters’s research and considers the maths to be not mistaken however was rejected by the trainer, Mr. Wang went to the trainer to get the reply. Right here, the trainer responded to the guardian’s query that: “My son did not do something mistaken. Nonetheless, he solely did one of many 4 conditions of the reply.”

Subsequent, the trainer took out a paper and pen after which identified 3 circumstances for folks and college students to know the issue collectively. Accordingly, in case 1, if Mr. A has 2 payments of fifty yuan. You simply want to offer a 50 yuan invoice to the shopkeeper and get 15 yuan again (50 – 35 = 15).

Case 2, if Mr. A has 5 20 yuan payments. He’ll merely give 2 20 yuan payments to the shopkeeper and get 5 yuan again (2×20 – 35 = 5).

And case 3, if Mr. A has 1 50 yuan invoice, 1 20 yuan invoice, 1 10 yuan invoice and a pair of 5 yuan payments, he solely wants to offer 1 20 yuan invoice, 1 10 yuan invoice and 1 yuan invoice. 5 yuan to the vendor and acquired no change (20 + 10 + 5 – 35 = 0).

The trainer’s reply was very detailed however nonetheless didn’t make the guardian happy, Mr. Wang mentioned that his son’s reply was not mistaken and shouldn’t be crossed out. Furthermore, this can be a math drawback for 1st graders, not a puzzle, forcing a toddler who’s studying to color to attract sufficient hypotheses, do math, however like puzzle youngsters.

Earlier than this viewpoint of Mr. Wang, many individuals voiced their help. From the very starting, the crux of the issue was that Mr. A used 100 yuan to purchase issues, with none further situations on the denominations, however the trainer requested the scholars to kind out the denominations after which give the cash. out solutions. An issue that isn’t clear on the subject, lacks information, can’t ask the coed to offer the reply she needs.