Money （钱）is very important in life, although it is quite pointless to compare it with things that are best not to be measured in money. Money is money. It does what it does. It is very important. Period.

I ask my children “If you have $100 and you spend $100. How much do you have left?” “Nothing left”. “Likewise, if you have $1,000,000 and you spend $1,000,000. How much do you have left?” “Zero!”

That is right. To be rich, it is not only important that one needs to make money, but also save money (节省）. My children know that we should buy things on sale as much as possible.

We were looking at historic prices of properties in Zillow.com. I showed them the time series of prices and point to the trough in 2009 “this is sale price” and the peak in 2005 “and this is the full price that we should never pay for. “

When we go shopping, I try to let my children pay. Before we come to the cash register, if our shopping cart is not that full, I will ask them to try to sum up how much the total is and compare how close our calculation is to the actual.

There are just so many places and so many things to learn. I have explained to my children what a bank does, interest rate, what collateral means and so on. “Why do you think the bank employees are so nice to us by giving us candies/hot chocolate when they are helping us to keep our money?”

I come here searching for Let kids learn about money and finance 钱.

Now, Mathematics comes from many different varieties of problems.

Initially these were within commerce, land dimension, structures and later astronomy; today,

all sciences suggest problems examined by mathematicians, and many problems occur within mathematics itself.

For instance, the physicist Richard Feynman created the path essential formulation of quantum technicians utilizing a

blend of mathematical reasoning and physical perception, and today’s string theory,

a still-developing technological theory which tries to unify the four

important forces of dynamics, continues to motivate new mathematics.

Many mathematical items, such as collections of figures and functions, show internal structure because of procedures or relationships that are identified on the collection. Mathematics then studies properties

of these sets that may be expressed in conditions of that composition; for instance quantity theory studies properties

of the group of integers that may be expressed in conditions of arithmetic procedures.

In addition, it frequently happens that different such organized sets (or set ups) show similar properties, rendering it possible, by an additional step of abstraction, to convey axioms for a school of buildings, and then review at once the complete class of buildings gratifying these axioms.

Thus you can study teams, rings, areas and other abstract

systems; mutually such studies (for set ups identified by algebraic procedures) constitute the site of abstract

algebra.

Here: http://math-problem-solver.com To be able to clarify the

foundations of mathematics, the areas of mathematical logic and collection theory were developed.

Mathematical logic includes the mathematical research of logic

and the applications of formal logic to the areas of mathematics; establish theory is the

branch of mathematics that studies pieces or selections of

items. Category theory, which bargains within an abstract way

with mathematical set ups and associations between them,

continues to be in development.