1

Problem

Rearrange numbers in the descending order:

22.5,24.5,36.5,38.9.

2

Step

In this problem, all numbers have one digit after the decimal point.

3

Hint

When comparing decimals with the same digits after the decimal point, the one with the larger whole number part is larger.

4

Clue

If the whole number parts are also the same, compare the tenths place (the first digit after the decimal point).

5

Step

The largest decimal is the one with the highest digit in the tenths place. In this case, 38.9 has a tenths place digit of 9, which is larger than any other.

6

Step

If the decimal places are the same, continue comparing digits to the right.

7

Step

Among 22.5, 24.5, and 36.5, 36.5 has the highest digit.

8

Step

Finally, we compare the whole number before the decimal point. 24.5 has a higher digit than 22.5.

9

Solution

Therefore, arranging these numbers in descending order gives us: 38.9, 36.5, 24.5, and 22.5.

10

Sumup

Please summarize steps

Choices

11

Choice-A

This option correctly arranges the numbers in descending order

Correct 38.9, 36.5, 24.5, 22.5

12

Choice-B

This option arranges the numbers in ascending order (smallest to largest), which is the opposite of what is asked

Wrong 22.5, 24.5, 36.5, 38.9

13

Choice-C

Here, 24.5 is placed before 36.5, which breaks the descending order. So, this is wrong

Wrong 38.9, 24.5, 36.5, 22.5

14

Choice-D

This option incorrectly arranges the numbers and includes incorrect values ("38.5" and "36.9" instead of "36.5" and "38.9")

Wrong 22.5, 24.5, 38.5, 36.9

15

Step

Option

A

16

Sumup

Please summarize choices