3+ 18=7*3
7+47= 18*3
18+ 123=47*3
Crucially, the sum of all other items is the median times 3.
So the first number plus 47= 123*3=369, then the first number =369-47=322.
Add 123=322*3=966 to the second number, so the second number =966- 123=843.
You are great! It's really rare to be in grade three. I am on the line. Ask again if you don't understand.
The third grade Olympiad in primary school: finding the law. 2,8,5,20,7,28, 1 1,44, - 12
Even terms are four times as many as odd terms.
8/2=4
20/5=4
....
12/4=3
The answer is 3.
In the third grade of primary school, find a pattern and fill in the numbers: 1.3.8. 19.42. (). () The first question.
1、3、8、 19、42、89、 184
The legal provisions are as follows
1+ 1×2=3
2+3×2=8
3+8×2= 19
4+ 19×2=42
5+42×2=89
6+89×2= 184
the second question
? 2? 1? 7? eight
× 4
——————
? 8? 7? 1? 2
Number =8? Good =7? Learning = 1? Play =2
I wonder if it's right to find a way in the third grade of primary school? . deceptious
2 5 6 7 1 1
8 10 (9) 4 18
6 10 12 9 20
The first group: 5+6 =11-11= 0. 7-2=5
Group 2:10+9 =19-18 =1. 8-4=4
Group III: 12+ 10=22-20=2. 9-6=3
7 4 6
8 4 8
6 5(2)
The first group: 7-4=3. 3+3=6
The second group: 8-4=4. 4+4=8
Group 3: 6-5+ 1. 1+ 1=2
I don't know if I learned multiplication in the third grade, so I wrote addition.
2 6 7 1 1 4
4 4(3) 1 4
3 5 5 6 4
The first group: 2+7=9. 9-6=3 。 1 1+4= 15=5+5+5
The second group: 4+3=7. 7-4=3 。 1+4=5
The third group: 3+5=8. 8-5=3 。 6+4= 10=5+5
I asked this question blindly, and I don't know if I wrote it correctly! ~ ~ If you know the answer, you must send it! )
thank you ~ ~ ~ Quack! ~~~~
First, find a rule for filling numbers.
( 1)90、 1、75、 17、60、33、(45)、(49)、(30)。
Odd minus 15, even plus 16.
(2) 1、2、3、5、8、 13、2 1、(34)、(55)、(89)。
The first two numbers add up to the third number.
2. The following columns have a unique number. Please find it.
( 1)3、5、7、 1 1、 15、 19、23; -5 (because the difference between each adjacent number is 4)
(2)2、5、 10、 16、22、28、32、38、24; -24 (only it is smaller than the previous number)
(3)2、3、5、8、 12、 16、23、30。 -3 (because the difference between every two adjacent groups is equal, that is, the difference between 2, 5 and 8 is 3, 8, and 12 and 16 is 4 ...)
What is behind the law 2 5 25 125()()625, 3 125 in solving Olympic math problems in the third grade of primary school?
The legal provisions are as follows:
1×5=5
5×5=25
25×5= 125
125×5=625
625×5=3 125
Remember to adopt
In the third grade of primary school, the problem of finding the law of Olympic mathematics is 1, 2, 3, 6,1,20, (), 68, 12537. Except the first, second and third digits, starting from the fourth digit, it is 6, which is equal to the sum of the three digits of money.
Fill in the third grade Olympiad table 10 18 32 60 72 700 98 or 0.
2 5 6 8 10 9 100
Reason: The first number in the first line is equal to the first number in the second line multiplied by the second number, that is, 10=2*5.
The second number in the first row is equal to the second number in the second row minus the first number and then multiplied by the third number, that is, 18=(5-2)*3.
The third number in the first row is equal to the third number in the second row minus the first number and then multiplied by the fourth number, that is, 32=(6-2)*8.
So the fourth number in the first row is equal to the fourth number in the second row minus the first number and then multiplied by the fifth number, that is, (8-2)* 10=60.
The fifth number in the first row is equal to the fifth number in the second row MINUS the first number and then multiplied by the sixth number, that is, 72=( 10-2)*A, and A=9 can be obtained through calculation.
The sixth number in the first row is equal to the sixth number in the second row minus the first number and then multiplied by the seventh number, that is, (9-2)* 100=700.
The seventh number in the first row, because there is no eighth number to multiply in the second row, so if the eighth number is ignored, it is equal to 98, and if it is calculated by 0, it is equal to 0. I wonder what the questioner means.
Looking for patterns in the third grade of primary school: 26 65 438+08 54 () () 65 438+062,486,486 * 3 (calculate by yourself).
In the third grade of primary school, the problems of finding regularity are 1, 1 8,2,16,3, 14, (), ()1,18,2,/kloc-.
The rule is
1 2 3 4
18 16 14 12