Which well wisher told me about the 6th grade calculation problem short calculation . 15

(1) 9/9 3/4

2) 48/35 13/19 22/35 13/19 = (48 35 + 22 35) 19 13

3) (3/5 2/15) (1/12 5/6) = 7 15 12 11

4) 2 (2 2/5) 5/8

5) 13 (1 1/3) 3/4 = 13 [4 3 3 4].

13 (6) (1/4) 5/4

,2, 4+75%)

2,Original =,0,

1.A, B and C have a total of 168 yuan, the first time A takes out the same amount of money as B to B, and the second time B takes out the same amount of money as C and gives C the same amount of money; The third time, C took out the same amount of money as A and gave it to A, so that A, B, and C had the same amount of money. It turns out that how much more is A than B?

2.Describe a person's "eight-figure eyebrows" and "8:20", that is to say, the hour and minute hands should be symmetrical with the connection of "6" and "12" on the clock, and "8:20" is obviously asymmetrical, so how many points should the "eight-figure eyebrows" be?

Answer: Question 1: 1Third.

B A last 56

Before the third change.

56 before the second change.

28 before the first change.

7070-56 = 14 yuan.

Another 6/13 minutes.

It was 8:18 and 6/13.

This is done using the formula (a+b)x(a-b)=a2-b 2

Original = [1-(1 2) 2]x[1-(1 3) 2]x......x[1-(1/2016)^2]

3/4 x8/9 x 15/16 x……x(2016^2-1)/2016^2

The final answer is to find a pattern.

The first number is 3 4 and the first two numbers multiplied equals 2 3

The first three numbers are multiplied equals 5 8 The first four numbers are multiplied equals 3 5

The first five numbers multiplied equals 7 12 The first six numbers multiplied equals 4 7

And so on ......

The result of multiplying the first n numbers is:

If n is odd, then (n+2) [2*(n+1)].

If n is even, then (n 2 +1) n + 1

2016 2-1) 2016 2 is the 2015th number.

Now the calculation problems in elementary school are so complicated......

This kind of simple calculation is required to first find the characteristics of this question or the common point in **, the first question has the number 286, so the multiplication sign on both sides of the 48000* changed to 48 * 286, the result is the same, similar to the original formula = 286 * 39 + 286 * 48 + 286 * 13 = 286 * (39 + 48 + 13) = 286 * 100 = 28600. The second question is that there is such a number, you can replace 3333 * 6666 = 9999 * 2222 to get 9999 * (7778 + 2222) = 9999 * 10000 = 99990000, mathematics or do more will have a feeling, at a glance you can know what the question is going to test you. Hope to adopt.

(1) 9/9 3/4

2) 48/35 13/19 22/35 133/19) (3/5 2/15) (1/12 5/6) 4) 2 (2 2/5) 5/8

5) 13 (1 1/3) 3/4

6) (1/4) 5/4