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1. MATHEMATICS 1:
REVIEW LESSON

2. •Comparing and ordering numbers is a
concept in math where we compare the
numbers according to their values and
identify the smaller and bigger numbers and
then order them in ascending or descending
order.

3. Symbol Meaning Example
> Greater than 5 > 3
< Less than 2 < 9
= Equal to 4 = 4

6. • Ascending Order: The arrangement of data from the
smallest to the largest value is known as ascending
order.
For example, 1 < 2 < 3 < 4 < 5.
• Descending Order: The arrangement of data from the
largest to the smallest value is known as ascending
order.
For example, 5 > 4 > 3 > 2 > 1.

8. What are Ordinal Numbers?
•Numbers that are used to represent the rank or
position of an object or a person are known as
ordinal numbers. They are also referred to as
positioning or ranking numbers.

9. TO WRITE THE ORDINAL NUMBERS:
• Add “st” to 1, and other numbers ending in 1 after 20.
Examples: 1st, 21st, 31st, 41st,
• Add “nd” to 2, and other numbers ending in 2 after 20.
Examples: 2nd, 22nd, 32nd, 42nd
• Add “rd” to 3, and other numbers ending in 3 after 30.
Examples: 3rd, 23rd, 33rd, 43rd
• Add “th” after the ordinal numbers not mentioned above.
Examples: 4th, 11th, 20th, 26th