Millions

Numbers written in millions must contain at least 7 digits. The seven digits must have two spaces separating them in “threes” from the right-hand side.

Examples:

1. 12 000 000 stands for 12 million.
2. 2 000 000 stands for 2 million.
3. 1 000 000 stands for 1 million.
4. 238 000 000 stands for 238 million.

Billions

Numbers written in billions must contain at least ten digits with three spaces separating them in “threes” from the right-hand side.

Examples:

1. 12 000 000 000 stands for 12 billion.
2. 4 000 000 000 stands for 4 billion.
3. 7 456 201 456 stands for 7 billion, four hundred and fifty-six million, two hundred and one thousand, four hundred and fifty-six.
4. 835 000 000 000 stands for 835 billion.

Trillions

Numbers written in trillions must contain at least thirteen digits with four spaces separating them in “threes” from the right-hand side.

Examples:

1. 7 000 000 000 000 stands for 7 trillion.
2. 25 000 000 000 000 stands for 25 trillion.
3. 714 000 000 000 000 stands for 714 trillion.
4. 1 000 million is called a trillion.

EXAMPLE 1

Write the following numbers in words:

1. 51 807 508 051 754

Solution:

51 807 508 051 754 = 51 807 508 051 754 stands for fifty-one trillion, eight hundred and seven billion, five hundred and eight million, fifty-one thousand, seven hundred and fifty-four

1. 6 006 006 006

Solution:

6006006006 = 6 006 006 006 stands for six billion, six million, six thousand and six

1. 509 345
2. 3 457 300 284
3. 45 672 7 008

EXAMPLE 2

Write the following words in numerals

1. Three hundred and fifty-four thousand, seven hundred and twenty
2. Seven billion, two hundred and sixty-four million, one hundred and one thousand, two hundred and two

Solution:

Using expanded form,

1. 300 000 + 50 000 + 4000 + 700 + 20 = 354 720
2. 7 000 000 000 + 200 000 000 + 60 000 000 + 4 000 000 + 100 000 + 1000 + 200 + 2 = 7 264 101 202

NOTE: We no longer use commas between the groups of digits. Many countries use a comma as a decimal point; thus, to avoid confusion do not use commas for grouping the digits.

STUDENTS ACTIVITY:

Question 1:   Write the following figures in words:

(i).   15284037     (ii).  789030861     (iii).   512278374415

(iv).  734015090700018     (v).  89780260044784 .

Question 2:   Express the following in figures:

(i). Seven hundred and ninety-eight million, one hundred and thirty- two thousand five Hundred and forty- five.

(ii). Twenty-four billion, seventy-eight million, four hundred and thirty-six thousand, one Hundred and forty -eight.

(iii). Thirteen trillion, nine hundred and forty-one billion, three hundred and twenty-four million, forty-seven thousand, one hundred and ninety-eight.

(iv). Four hundred and seventeen trillion, two hundred and eighty billion, five hundred and        six thousand, eight hundred and eighteen.

(v). Eighteen million, twenty-five thousand, six hundred and one.