"1.2+1.4+1.6+1.8+…… How to calculate "8.0"?

"1.2+1.4+1.6+1.8+…… How to calculate "8.0"?

1.2＋1.4＋1.6＋1.8＋…… ＋8.0
＝（1.2＋8.0）×35÷2
＝9.2×35÷2
＝4.6×35
＝161
(Note: there are 35 numbers in total)

How to calculate 3 / 4 + 5 / 6 + 1 / 8

Same score 18 / 24 + 20 / 24 + 3 / 24 = 41 / 24

A simple algorithm was used to calculate 8.65-2.05-1

8.65+(0.1-0.1)-2.05-1.7=8.75-3.75-0.1=4.9
Your results upstairs are all wrong. What's the matter

Write 0.000216 as a negative integer exponential power

2.16×10^(-4)
Good luck

-0.000012 is written as a negative integer exponential power

-1.2

How many factors does the square of a prime number have

How many factors does the square of prime number have!
There are: 1, the prime, the prime's Square
For example: 3;
3²=9
The factors of 9 are: 1, 3 and 9

The square of a prime number has () factors

Three
Let X be the prime number,
Then the factors of X & sup2; are 1, √ (X & sup2;) (x), X & sup2

Two two digit prime numbers, the difference is 6, and the square numbers are the same, so the group number of two digit prime numbers is 6

First of all, the prime number of two digits must not be even and must not be divisible by 5. Therefore, the digits of a square can only be 1, 3, 7 and 9. The digits of a square can only be 1, 9, 9 and 1

If a is prime and the square + 5 of a is prime, then the third power + 5 of a is ()

A is a prime number, only 2 of which is even, and the rest are odd
If a is odd, then a is odd
If a & # 178; + 5 is even and greater than 2, it is not prime
So a is even, and that's only a = 2
A & # 178; + 5 = 9 is not prime
So there is no solution to this problem

The opposite number of a-2b + 3C is______ ．