# TABLES, CHARTS AND SCHEDULES

**FIRST TERMÂ **

**LEARNING NOTES**

**CLASS: JSS 2 (BASIC 8)**

**SCHEME OF WORK WITH LESSON NOTESÂ **

**Subject:Â **

### MATHEMATICS

**Term:**

**FIRST TERMÂ **

**Week:**

**WEEK 9**

**Class:**

**JSS 2 (BASIC 8)**

**Previous lesson:Â **

The pupils have previous knowledge of

**Â Â BASIC OPERATIONS ON DIRECTED NUMBERS**

that was taught as a topic during the last lesson.

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**Topic :**

**TABLES, CHARTS AND SCHEDULES**

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**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)

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**Instructional Materials:**

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

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**Methods of Teaching:**

- ClassÂ Discussion
- Group Discussion
- Asking Questions
- Explanation
- Role Modelling
- Role Delegation

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**Reference Materials:**

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

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**Content**

**TABLES, CHARTS AND SCHEDULES**

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**TOPICS**

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

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**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:**

- With the use of tables, evaluate:

(a) 33.62^{2} (b) 0.36^{2}

Solution:

(a) 33.62^{2}

33.62 lies between 30 and 40. Therefore 33.62^{2}lies between 30^{2} and 40^{2}

30^{2} = 900

40^{2} = 1600

Thus, 33.62^{2}lies 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, 33.62^{2} = 1130

(b) 0.36 = 3.6 Ã— 10^{-1}

0.36^{2} = (3.6 Ã— 10^{-1})^{2}

= 3.6^{2} Ã— 10^{-2}

3.6 is between 3 and 4

3^{2} = 9

4^{2} = 16

Therefore 3.6^{2}is between 9 and 16.

From the table of squares of numbers

3.6^{2} = 12.96

Thus,

0.36^{2} = 12.96 Ã— 10^{-2}

= 0.1296

**EXAMPLE 2: **Use tables to find:

(a) 3.8âˆ’âˆ’âˆ’âˆš; (b) 38âˆ’âˆ’âˆš; 380âˆ’âˆ’âˆ’âˆš

Solution:

(a) 3.8âˆ’âˆ’âˆ’âˆš

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, 38âˆ’âˆ’âˆš lies between 6 and 7.

Look for 38 under x. Locate the four-digit number under 0, the required number is 6.164. Thus 38âˆ’âˆ’âˆš = 6.164

(c) 380 = 3.8 Ã— 10^{2}

380âˆ’âˆ’âˆ’âˆš=3.8âˆ’âˆ’âˆ’âˆšÃ—102âˆ’âˆ’âˆ’âˆš=3.8âˆ’âˆ’âˆ’âˆšÃ—100âˆ’âˆ’âˆ’âˆš=3.8âˆ’âˆ’âˆ’âˆšÃ—10

From (a)

3.8âˆ’âˆ’âˆ’âˆš=1.949

Thus,

380âˆ’âˆ’âˆ’âˆš=1.949Ã—10=19.49

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**CLASS ACTIVITY**

Use four figures table to evaluate

- (a) 5.23
^{2}(b) 3.7^{2}(c) 0.56^{2} - (a) 5.4âˆ’âˆ’âˆ’âˆš (b) 37.62âˆ’âˆ’âˆ’âˆ’âˆš (c) 0.463âˆ’âˆ’âˆ’âˆ’âˆš

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

**U**se 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

- Use the table to find the average rainfall for the following;

(i) Sokoto in January

(ii) Jos in May

(iii) Ibadan in july

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

Solution

- (i) 0mm

(ii) 203mm

(iii) 160mm

- 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

- 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.

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**PRACTICE EXERCISES**

- 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% | |

- 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?

- Find the square roots of the following using table:

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

- Find the square of the following using tables:

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

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**Presentation**

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The topic is presented step by step

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Step 1:

The class teacher revises the previous topics

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Step 2.

He introduces the new topic

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Step 3:

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

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**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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