How much is two fifths plus four fifths?

How much is two fifths plus four fifths?

Six fifths

Is a cycle of 0.9 equal to one
2222, come on

1 / 9 equals 0.1 cycle, 0.9 cycle equals 0.1 cycle times 9, that is, 1 / 9 times 9, the result is 1. So it is equal

Is a cycle of 0.9 equal to 1
It is said that a cycle of 0.9 equals 1 for the following reasons:
Because 1 divided by 3 is equal to 1 / 3, that is, a cycle of 0.3, and a cycle of 0.9 divided by 3 is also a cycle of 0.3. So a cycle of 1 equal to 0.9 is wrong, but I don't know how to refute it
What's the difference between a 0.3 cycle and a 0.3333 cycle?

The above reasons are not sufficient:
For example, how do you know: 1 / 3 = 0.333
You said it was out of the division. Are you finished?
Please see my proof:
set up
A=0.99999999999999.
that
10A=9.99999999999999.
and
10A-A=9
9A=9
A=1
therefore
A=0.9999999999999...=1

Is 0.9 cycle equal to 1
First of all, I'm a primary school student. Yes, you didn't hear me wrong
Some people say: 1 △ 3 = 1 / 3 = 0.3 cycle
1 / 3 = 0.3 cycles
Properties of the equation: 1 / 3 * 3 = 1, then 0.3 cycle * 3 = 0.9 cycle
So 0.9 cycle = 1
But I don't think so
The problem lies in the 0.3 cycle
Make a vertical form of 1 ／ 3. Of course, you can't divide it completely. There will always be a remainder at the end
This remainder results in a 0.9 loop = 1
Quotient × divisor + remainder = divisor
The quotient is 0.3, the divisor is 3, it's 0.9, but there's a remainder
Is 9 equal to 1

0.9 cycle = 0.3 cycle + 0.6 cycle
0.3 cycle = 1 / 3
6 cycles = 2 / 3
therefore
0.9 cycle = 0.3 cycle + 0.6 cycle
＝1/3 + 2/3
=1