Page 42 - Maths Skills - 7

40 Maths

3. A soccer team is to be selected from a group of probables numbering more than 16 but less than
1
30 attending the training-cum-fitness camp. Amongst these probables are below the age of 16 years.
3
1 are in the age group 16 to 18 years and the remaining are above 18 years.
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(i) How many probables attended the camp? (ii) What fraction of probables are above 18 years.

Word Stock
Fraction Operation Comparison Conversion Reciprocal Order
Improper Ascending Descending

Activity

Objective: To multiply the given decimal numbers using number grid.
Pre-Requisite Knowledge: 1. Concept of decimals 2. Concept of multiplication
Materials Required: Two grids of 10 × 10 on transparent sheet, sketch pens / markers and a ruler.

Procedure: 1. Choose the two decimal numbers to be multiplied. Let these be 0.5 and 0.7.
2. Take a grid of 10 × 10 and represent 0.5 on it as shown in Fig. 1. Colour 5 strips out of
10 strips with one colour (horizontally).

Fig. 1 Fig. 2 Fig. 3
3. Take another grid of 10 × 10 and represent 0.7 by colouring 7 strips with another colour vertically
as shown in Fig. 2.
4. To show the product, overlap the two grids and observe as shown in Fig. 3. The double shaded
area represents the product.
5. Repeat the activity by taking different sets of numbers and record your observations.

Observations :
S. No. First Number Second Number Product
1.
2.
3.

4.
5.
6.