Third grade math textbook from China. Can your kid answer the questions? (college, schools)

[Bettafish]

Translation

1. In a subtraction operation, the sum of the minuend, the subtrahend, and the difference is 100, and the subtrahend is 4 times that of the difference. What are the three numbers, receptively?

2. In a subtraction operation, the sum of the minuend, the subtrahend, and the difference is 72, and the difference is 3 times that of the subtrahend. What are the three numbers, receptively?

3. There are 3 boxes. If we weigh two of them each time, we get 52kg, 50kg, and 48kg. What is the weight of the heaviest box?

4. Mom bought three kinds of fruits. Apples and oranges count 25 items in total, apples and peaches 27 in total, peaches and oranges 22 in total. How many items of fruits did mom buy in total?

Geometry
ABCD is a square. EC=24cm, AF=30cm. What is the perimeter of the largest rectangle?

[Gold miner]

Are you sure these are from textbooks? They look more like competition problems. I bet most non STEM college students are unable to solve them.

[Gold miner]

45 views and no volunteer. Let me take a shot at these "Common Core" math with Chinese characteristics.

1) 50-40=10

2) 36-9=27

3) 50+52+48=150, 150÷2-48=27

4) 25+27+22=74, 74÷2=37

5) 24+24+30+30=108

Proud to be smarter than a 5̶t̶h̶ 3rd grader!

[jtab4994]

Originally Posted by Gold miner

Are you sure these are from textbooks? They look more like competition problems. I bet most non STEM college students are unable to solve them.

I agree. I can't imagine there are 1.5 billion Chinese who could do this stuff in 3rd grade. They are not a race of super-men.

[17thAndK]

Either that or typical Americans don't realize how dumb we've collectively allowed ourselves to become.

[skycaller23]

That's pretty advanced for 3rd grade..systems of equations involving 3 variables.

Here in the US 3rd grade involves learning your multiplication tables.

[psikeyhackr]

Originally Posted by Gold miner

Are you sure these are from textbooks? They look more like competition problems. I bet most non STEM college students are unable to solve them.

STEM college students that could not solve them should not be doing STEM.

That first one is JUST an algebra problem. The nitwit nuns didn't use the algebra books they gave us in 8th grade.

So anyone that can do algebra should be in STEM?

I never had problems doing math but remembering what was meant by minuend and subtrahend was silly. No one ever used the words except in math class.

[charlygal]

These are not that difficult. A third grader could do these if they have been in a strong math program. Americans are notoriously afraid of math and our math programs in schools are not aggressive at all. Most Americans complain about having to learn any math beyond basic addition and subtraction.

[17thAndK]

Originally Posted by psikeyhackr

I never had problems doing math but remembering what was meant by minuend and subtrahend was silly. No one ever used the words except in math class.

Every discipline has its own lingo. It's not a big deal.

[charlygal]

Originally Posted by 17thAndK

Every discipline has its own lingo. It's not a big deal.

Exactly. There is a number on the left and right of the minus sign. Those numbers have names.