Page 102 - ICSE Math 6

3. The line segment between the integers –1 and 1 on the number line is equally divided into 200
th
equal segments. The 17 mark to the right of 0 represent the decimal A.
(i) How will you read the decimal A?

th
(ii) What decimal does the 32 mark to the right of A represent?
Individual Activity

Objective: To understand the concept of addition of decimal numbers

Material required: Chart paper, sketch pen, coloured pencils
Demonstration: Let’s add 2.13 and 1.8.
Let a big square represents 1 unit.
Represent the decimal number 2.13 by shading
2 big squares (subdivided into 100 equal small
squares) and 13 small squares.

Represent the decimal number 1.8 by shading 1 big square
and 80 small squares.
The sum of decimal numbers 2.13 and 1.8 is represented by
combining the shaded squares representing the two decimals.
The coloured part represents the sum as 3.93.

Verification: We can verify the result by directly adding the decimals 2.13
2.13
and 1.8 + 1.80
Note: Using the same method find the sum of decimals: 3.93
(a) 2.12 and 3.38 (b) 0.7 and 1.2.

86