# TABLES, CHARTS AND SCHEDULES

FIRST TERM

Subject:

Term:

Week:

Class:

### JSS 2 (BASIC 8)

Previous lesson:

The pupils have previous knowledge of

BASIC OPERATIONS ON DIRECTED NUMBERS

that was taught as a topic during the last lesson.

Topic :

TABLES, CHARTS AND SCHEDULES

Behavioural objectives:

At the end of the lesson, the pupils should be able to

• Calculate square and square root of numbers.
• Read charts, records and schedules (tabulated data, flight schedules and timetables)

## Instructional Materials:

• Wall charts
• Pictures
• Related Online Video
• Flash Cards

Methods of Teaching:

• Class Discussion
• Group Discussion
• Explanation
• Role Modelling
• Role Delegation

Reference Materials:

• Scheme of Work
• Online Information
• Textbooks
• Workbooks
• 9 Year Basic Education Curriculum
• Workbooks

### Content

TABLES, CHARTS AND SCHEDULES

TOPICS

1. Square and Square Root Tables.
2. Charts, Records and Schedules (tabulated data, flight schedules and timetables)

Square and Square Root Tables

The statistical/four figure table can be used to find the squares and square roots of four-digit numbers.

Example 1:

1. With the use of tables, evaluate:

(a) 33.622 (b) 0.362

Solution:

(a) 33.622

33.62 lies between 30 and 40. Therefore 33.622lies between 302 and 402

302 = 900

402 = 1600

Thus, 33.622lies between 900 and 1600.

Locate 33 under letter x. Move to the right and locate the number under 6. This number is 1129. Locate the number under difference 2.

This number is 1. Add 1 to 1129 to give 1130.

Therefore, 33.622 = 1130

(b) 0.36 = 3.6 × 10-1

0.362 = (3.6 × 10-1)2

= 3.62 × 10-2

3.6 is between 3 and 4

32 = 9

42 = 16

Therefore 3.62is between 9 and 16.

From the table of squares of numbers

3.62 = 12.96

Thus,

0.362 = 12.96 × 10-2

= 0.1296

EXAMPLE 2: Use tables to find:

(a) 3.8−−−√; (b) 38−−√; 380−−−√

Solution:

(a) 3.8−−−√

Look for 3.8 under x in the four-figure table. Locate the four-digit number under 0.

The required number is 1.949

(b) 38 lies between 36 and 49. Therefore, 38−−√ lies between 6 and 7.

Look for 38 under x. Locate the four-digit number under 0, the required number is 6.164. Thus 38−−√ = 6.164

(c) 380 = 3.8 × 102

380−−−√=3.8−−−√×102−−−√=3.8−−−√×100−−−√=3.8−−−√×10

From (a)

3.8−−−√=1.949

Thus,

380−−−√=1.949×10=19.49

CLASS ACTIVITY

Use four figures table to evaluate

1. (a) 5.232 (b) 3.72 (c) 0.562
2. (a) 5.4−−−√ (b) 37.62−−−−√ (c) 0.463−−−−√

Charts, Records and Schedules (tabulated data, flight schedules and timetables)

Use of tables are the most convenient and concise way of presenting numerical data. Tables have a wide range of uses.

They are used to convey a large amount of information.

EXAMPLE: Monthly rainfall chart

 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Sokoto 0 0 0 10 48 91 155 249 145 15 15 0 Jos 3 3 28 56 203 226 330 292 213 41 3 3 Ibadan 10 23 89 137 150 188 160 84 178 155 46 10 Port Harcourt 66 109 155 262 404 660 531 318 518 460 213 81

Use the table to find the average rainfall for the following

1. Use the table to find the average rainfall for the following;

(i) Sokoto in January

(ii) Jos in May

1. For each town, name the month which has the highest rainfall.
2. For each town, name the month(s) with the lowest rainfall.

Solution

1. (i) 0mm

(ii) 203mm

(iii) 160mm

1. For Sokoto August has the highest rainfall with 249mm

For Jos, July has the the highest rainfall with 330mm

For Ibadan, June has the highest rainfall with 188mm

For Port Harcourt, June has the highest rainfall with 660mm

1. For Sokoto, January, February, March and December have the lowest rainfall

For Jos, January, February, November and December have the lowest rainfall

For Ibadan, January and December have the lowest rainfall

For Port Harcourt, January has the lowest rainfall.

PRACTICE EXERCISES

1. The Social Services Department (SSD) of a large city has fixed budget. Table bellow shows how the SSD allocates its budget for raising public awareness in four key areas for the year 2008 to 2010.
 Public awareness areas Resource allocation 2008 2009 2010 Out-of school children 25% 20% 15% HIV/AIDS prevention 60% 60% 60% Parenting skill 5% 5% 5% Substance abuse 10% 15% 20% Total 100% 100% 100%
1. Social Service Allocation

(a) What appears to be the greatest priority for the SSD?

(b) What appears to be the lowest priority?

(c) What appears to be a growing area of concern over the period?

1. Find the square roots of the following using table:

(a) 63; (b) 7.3; (c) 720

1. Find the square of the following using tables:

(a) 3.85 (b) 2.4 (c) 135.

Presentation

The topic is presented step by step

Step 1:

The class teacher revises the previous topics

Step 2.

He introduces the new topic

Step 3:

The class teacher allows the pupils to give their own examples and he corrects them when the needs arise

### Conclusion

The class teacher wraps up or concludes the lesson by giving out a short note to summarize the topic that he or she has just taught.

The class teacher also goes round to make sure that the notes are well copied or well written by the pupils.

He or she makes the necessary corrections when and where the needs arise.

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