```html Grade 5 Interactive Math Workbook - Pages 10, 11, 13, 14

2- Fill in the squares on the multiplication table:

1 2 3 4 5 6 7 8 9 10 11 12
The origin of 49 = 7 x 7, 100 = 10 x 10
A square root goes in the opposite direction of powers
square 6 36 square root

A square root of a number is the value that can be multiplied by itself to give the original number. Then the square root of 36 is 6 because when we multiply 6 by itself, we get 36.

This is the symbol that means “Square root” √
If √25 = 5
√100 = 10
√16 = 4
Find
a) √49 =
7
b) √ 1  =
1
c) √144 =
12
d) √81 =
9

A number made by squaring a whole number is called a perfect square, such as 9, 16, 25, 36 ...

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Numbers Perfect Square

Try to remember at least the first 10 numbers with their perfect squares.

With your teacher, use the calculator to find the square root.

Does it work? Yes, it works!
Numbers Square Root
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XII III VI IX
1.6 Roman Numerals

The numbers that we use today are called Arabic numerals. These numbers are 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9.

In the past, people used fingers or objects such as sticks and pebbles for counting, but this was difficult when large numbers were needed.

Different symbols were then invented to represent numbers.

The Romans invented a system for writing numbers. They used symbols to represent numbers.

Arabic numerals Roman numerals

You can see that there is no symbol for the number 2 or 4 or 8.

They used the same symbol I or V or X and joined them with each other to represent large numbers.

13

Read the table below:

Arabic numeral Roman numeral Arabic numeral Roman numeral
Exercises

1- Write the Roman numerals in the table:

Arabic numeral 1 5 10 20 50 100 500 1000
Roman numeral

2- Write the Roman numerals of:

3- Write the Arabic numerals of:

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