Week 1 and 2 – Jss 1 First Term General Mathematics Lesson Notes

GENERAL MATHEMATICS
Jss 1 SCHEMES OF WORK FOR ALPHA TERM

 WEEK 1        WHOLE NUMBER (COUNTING AND WRITING IN MILLIONS,& TRILLIONS)
WEEK 2        WHOLE NUMBER (CONTD.,)
WEEK 3        FRACTIONS (TYPES OF FRACTIONS)
WEEK 4        FRACTIONS (EQUIVALENTFRACTIONS AND PROBLEMS SOLVING)
WEEK 5        FRACTIONS (CONVERTION FROM PERCENTAGE TO DECIMAL VICE-VERSA
WEEK 6        FRACTIONS (ADDITION, SUBTRACTION)IRST
WEEK 7        REVIEW OF THE FIRST HALF TERM WORK AND PERIODIC TEST
WEEK 8        FRACTIONS (MULTIPLICATION AND DIVISION)
WEEK 9        L.C.M AND H.C.F (LOWEST AND HIGHEST COMMON FACTOR
WE EK 10        ESTIMATION
WEEK 11        REVISION OF THE FIRST TERM AND EXAMINATION
WEEK 12        EXAMINATION

WEEK 1 TOPIC: WHOLE NUMBERS (COUNTING IN M ILLINS, BILLINS AND TRILLIONS)

 
 CONTENTS:    
The figures 0,1,2,3,4,5,6,7,8,9 are called digits or unit. Numbers 10, 11,12,13,14,…. 99 are called Tens, numbers 100,101,… 999 are called hundred. One thousand is written as 1 with 3 zeros.
LARGE NUMBERS
NAME                                         VALUE
One thousand                                 1000
Ten thousand                                 10000
One hundred thousand                              100000
One million                     1000000
Ten million                             10000000
One hundred million                     100000000
One billion                             1000000000
Ten billion                         10000000000
One hundred billion                 100000000000
One trillion                         1000000000000
In our everyday life, we often come across large numbers such as 75800074890.
75         800              074            8        9        0
Billion        million            thousand     hundred     ten        unit

 
 
 Example 1: write this in figures: twenty five trillion, three hundred and five billion, six hundred and sixty nine million, one hundred thousand and forty one.
Example 2: ninety billion, three hundred and nine million, ninety one thousand seven hundred and six three.
Solution

1. 25 000 000 000 000

   305 000 000 000
   669 000 000
   1 000
   41
   25 305 669 001 041
   

1. 19 000 000 000

   309 000 000
   91 000
   763
   19 309 091 763
   
    Order large numbers
   
    Example 1: arrange these numbers in order of size stating with the smallest: 28980579, 18967547, 2897871, 36497871, 36479568, 18898069, 36478967

    Note that 🙁 This arrangement is also called ascending order. The reverse is known as descending order).
   NB: Always group large numbers in threes.
   Solution
   18 898 069, 18 967 547, 28 978 951, 28 980 579, 36 478 967, 36 479 568, 36 497 871

    DO THESE
   

   1. Write the following in words (a) 567256789, (b) 18000901234
      

       

   2. Write in figures (a) three hundred and twenty – nine billion, five hundred and sixty two million, eight hundred and one thousand, four hundred and thirty three
      

    (b) fifteen trillion, six hundred and seventy one billion, three hundred and ninety one million, eighty eight thousand, five hundred and fifty five.
   
    

   1. Arrange the following numbers in ascending order 1009085941, 1288890563, 102458001, 999999999, 10009002, 105879894167
      

       Assignment
      Page 23 exercise 3.1 No 2 page 25 exercise 3.3 No (a, b c)