Whole Numbers.2

Mathematics for JSS 1 First Term

 Week 2

Whole Numbers.2

Performance Objectives.

Students should be able to

1. Count and write in trillions.

2. Solve problems on quantitative aptitudes reasoning using large numbers.

Content.

In the previous lesson, we were able to establish that we use the digits 1,2,3,4,5,6,7,8,9,0. as digits in number s.

So from there

1-Unit

21- 2 Tens,1 Unit

321-3 Hundred,2 Tens, and 1 Unit

4321- 4 thousand,3Hundred,2 Tens, and 1 Units

54321-Tens of thousand, 4 Thousand,3 Hundred,2 Tens, 1 Units

654321-6 Hundreds of thousands, 5 Tens of thousands,4 Thousand,3 Hundred,2 Tens and 1 Unit.

7654321-7 Million,6 Hundreds of thousand,5 Tens of thousand,4 Thousand,3 Hundred,2 Tens and 1 Unit.

87654321- 8 Tens of million,7 Million,6 Hundreds of thousand, 5 Tens of thousand, 4 Thousand, 3 Hundred,2 Tens, 1 Unit.

987654321-9 Hundreds of million, 8 Tens of million, 7 Million, 6Hundreds of thousand, 5 Tens of thousand, 4 thousand,3 hundred, 2 Tens 1 Unit.

0987654321- 0 Billion, 9Hundreds of million, 8 Tens of million, 7 Million,6 hundreds of thousand, 5 Tens of thousand,4 Thousand,3 Hundred, 2Tens 1 Unit.

00987654321-0 Tens of billion, 0 Billion,9 Hundreds of million, 8 Tens of million, 7 Million,6 hundreds of thousand, 5 Tens of thousand,4 Thousand,3 Hundred, 2Tens 1 Unit.

0009876543321-0 Hundreds of Billion,0 Tens of billion, 0 Billion,9 Hundreds of million, 8 Tens of million, 7 Million,6 hundreds of thousand, 5 Tens of thousand,4 Thousand,3 Hundred, 2Tens 1 Unit.

0000987654321-0 Trillion, 0 Hundreds of Billion,0 Tens of billion, 0 Billion,9 Hundreds of million, 8 Tens of million, 7 Million,6 hundreds of thousand, 5 Tens of thousand,4 Thousand,3 Hundred, 2Tens 1 Unit.

From the above one can deduce that trillion should be of 13 digits.

 

So we move ahead to writing in figures.

Example 1: Write in figure Three trillion, five billion, Eight Million, nine hundred and forty-five thousand and twenty.

Answer: 3000000000000+000000000000+00000000000+5000000000+00000000+00000000+ 8,000,000+900,000+40,000+5000+20=3,005,008,945,020.

Example 2: Write in figure two trillion, seven hundred and fifty-nine thousand, eight hundred and twenty-five

Answer:2,000,000,000,000+700,000+50,000+800+20+5=2,000,000,750,825.

ASSESSMENT:

From the options lettered A-D pick the correct answer to writing the following in figure.

1.Twelve million, two hundred and eight thousand and fifty-nine.        A)12000280059      B)120002280059 C)120002800159         D)1228020590000

2. Three trillion and four.     A)3000000000004  B) 300000000000040   C)3 0000000000004  D)3000000000004.

3.Fifteen trillion, fifteen thousand and fifty-two.      A)15000015052        B)15000000015052 C)150000000001502   D)1500000015052000.

4.Ninety-nine trillion, ninety-nine billion, ninety-nine million, eighty thousand nine hundred and forty-one.       A)99099099080941 B)990999099080941        C)9999099080941       D)990990998941.

5.Eight million eight hundred and eight. A)8000808      B)800000808        C)80000000808   D)80000808.

PERIOD 2.

Writing from words to figures.

Content.

In the last lesson, we can write from figures to words, the main objective of this lesson is to be able to write figures in words.

Example 1:Express 2,403,236,750,825 in words.

Answer: Two trillion, Four hundred and three billion, two hundred and thirty-six million, Seven hundred and fifty thousand, eight hundred and twenty-five

Example 2: Express 8,200,000,945,020 in words.

Answer: Eighty trillion, two hundred billion, nine hundred and forty-five thousand, and twenty.