Please help you solve 10 math problems with 7 miscalculations

In fact, this is a confusing question, and it will be much easier if you look at it from another angle. The fact that Boss Wang exchanged money with the neighbors can be ignored, because the final result is that the neighbor gives him 100 and then he pays back 100.

Therefore, it is necessary to look at Boss Wang's income and actual pay.

Income: 100 fake speculation, so Boss Wang's income is 0

Pay: 79 yuan for real fried and goods (worth 18).

So pay = 79 + 18 = 97

As a result, Boss Wang lost 97 yuan.

It should be 97 This kind of topic depends on which angle you start from, you think like this: the neighbor is only responsible for exchanging money, and later the boss of the counterfeit bill also lost, so the neighbor doesn't have to count it. So in this way, it depends on how much the young man earns, and how much Boss Wang loses.

The young man took 79 yuan in real money, plus 18 yuan in gifts. (Note that it is 18, not 21, because the cost is 18) so 79+18=97.

Suppose Boss Wang's cash is 0 yuan, and there are only 18 yuan worth of goods, and the real money of the neighborhood is 100 yuan, and after the young man is recovered, 100-79 21 yuan is left, and the neighborhood returns 21-100 -79 yuan after discovering the fake money.

Plus the cost of lost goods - 79-18 -97 yuan.

That is: Boss Wang lost 97 yuan.

The trade gets 21-18=3 in.

Find a young man 79 out.

Receipt of $100 counterfeit banknote = 0

Swapped $100 for genuine money at a neighbor's.

So the loss is only 79-3=76 yuan.

Assuming that he gave real money, Lao Wang earned 3 yuan, so the answer to this question is 3-100, and the loss is 97 yuan.

100 is equivalent to the young man not giving him 100 yuan.

Wrong book model rate Number of wrong questions The number of blind questions in the full sail posture is 100

The error rate is not 7, but.

There are a total of 32 questions, what is the correct rate of 7 mistakes?

Best: A: The correct rate is 78

There are 29 questions in total, and 7 questions are wrong, and the error rate is 7 29x100%=

5、 3

10, 160, note that the height is 1 meter, that is, 10 decimeters 11, 22

The -2 power of (-2) = 1 4 is easily calculated as -1 4

It's good to test others!! It's easy to miscalculate.

Logical misleading questions.

Xiao Ming borrowed 500 yuan from his father, borrowed 500 yuan from his mother, bought a pair of shoes with a surplus of 970 yuan, and left 30 yuan, returned 10 yuan to his father, and returned 10 yuan to his mother, which is equivalent to his parents each lending 490 yuan to Xiao Ming, 490 + 490 = 980 yuan, plus Xiao Ming's remaining 10 yuan, which is equivalent to 990 yuan, so where did the remaining 10 yuan go?