When Beibei calculates 1.6 plus a two place decimal, he aligns the ends of the two numbers and gets the sum of 3.49. Write the correct formula

The correct algorithm is to find the unknown addend = (3.49-1.6) △ 10, but the result is three decimal places, which is inconsistent with the condition

When I calculate 2.45 plus a decimal place, I align the end by mistake, and the result is 2.56. The correct answer is that () has a formula!

One tenth of a decimal is 2.56-2.45 = 0.11
One decimal is 1.1
The correct answer is 2.45 + 1.1 = 3.55

Move the decimal point of a decimal two places to the right, the result is 222.75 more than the original decimal

The original 2.25 is now 225

Move a decimal point two places to the right, the result is 222.75 more than the original decimal
Write out the process,

100x-x = 222.75
99x = 222.75
x = 2.25
Suppose the original decimal is X
Now the decimal is 100 times X
Subtracting two

After removing the decimal point of a two place decimal, it is 1212.75 larger than the original number. The original two place decimal is ()

After removing the decimal point of a two place decimal, it is expanded by 100 times, larger than the original number
100-1 = 99 Times
It turns out that the two decimal places are
1212.75÷99＝12.25

A decimal point is 321 points more than the original one after the decimal point is removed. The original decimal point is

By removing the decimal point is 321.75 larger than the original number, we can see that the original number after the decimal point must be * *.25, because the number after the decimal point is an integer, you need to subtract * *.25 to get. 75, so after removing the decimal point, the two digits of the integer must be 25, that is to say, one digit is 5, ten digits is 2, column vertical, you can know that the hundred digits must be 3, test 325 minus 3.25, the result is 321.75, the reasoning is correct!

If there is a decimal, if its decimal point is moved one place to the right, then the sum of the new number and the original decimal is 11.22, and the original decimal is 11______ ．

11.22 ÷ (10 + 1), = 11.22 ÷ 11, = 1.02; so the answer is: 1.02

Move the decimal point of a decimal two places to the right, and the number obtained is 5.94 larger than this number. What is the original decimal?

The decimal point of a decimal is moved to the right by two places, which is 100 times of the original
5.94÷（100-1）＝5.94÷99＝0.06
The original answer is 0.06

The decimal point of a decimal is moved to the right by one place, which is 45 times larger than the original. What is the original number?

If it moves to the right and is 10 times of the original number, then 10x-x = 45, 9x = 45, x = 5

Move a decimal point to the right by two places, which is 35.64 larger than the original number. The original decimal point is ()

0.36

When Beibei calculates 1.6 plus a two place decimal, he aligns the ends of the two numbers and gets the sum of 3.49. Write the correct formula