EXPRESSING NUMBERS in WORDS
(1) Numbers can be expressed in words using hundreds, thousands and millions.
(2) The last number to be written must be preceded by an ‘and’.
Example
2 7 8 is two hundred and seventy-eight
5 6 0 8 is five thousand six hundred and eight
4 5 6 70 is forty-five thousand six hundred and seventy
METHOD 1 – Grouping
Example: Write 8765432 in words
Step 1: Separate numbers from right to left, 3 numbers in one group
Step2: Fill From left to right:
- first underline is for hundred,
- second underline is for thousand
- third underline is for million
Step3: Write the word
METHOD 2: Place-Value-Table
A place-value table can be drawn to teach placement of values and word notations.
There are 4 main blocks to the place-value table:
(1) millions,
(2) thousands
(3) hundreds and
(4) decimals.
Within each block, it is further divided into hundreds, tens and ones.
A given number is to be written onto the place value table from the right to left.
Example:
Write 930527 in words
Step1: DRAW/FILL ‘9’,’3’,’0’,’5’,’3’,’7’ from the right to the left.
Step2: READ the number from left to right, and including the word at every end of
Practice:
Write the following in words : (a) 2930 (b) 47084 (c) 106507
{Ensure that the spellings are correct}
FROM WORDS TO NUMBER
METHOD1
Example
Convert eight million seven hundred and sixty-five thousand four hundred and thirty-two to numbers
Step1: Look/CIRCLE keywords – hundred, thousand and million
Step2: For million: draw 3 underlines with commas , , .
thousands: 2 underlines , .
Step3: Fill in numbers: million on first underline, thousands on 2nd underline and hundreds on 3rd underline
Eight million 8, , seven hundred and sixty-five thousand 8,765, four hundred and thirty-two 8,765,432
Answer: 8,765,432
METHOD2
Example
Write Eight million, seven hundred and sixty-five thousand, four hundred and thirty-two in number form.
Step 1: UNDERLINE keywords – “Million’ (if any), ‘thousand’
Step 2: CIRCLE words before keywords ‘Million’, ‘thousand’ and the last group.
8 , 765 , 432
Step 3: WRITE numbers below the circle, and put a comma for the underline words.
Answer: 8,765,432
From WORDS TO NUMBERS (DECIMAL)
Decimal number in words has ‘~th’, ‘tenth’ is the first decimal place, ‘hundredth’ is the second decimal place and ‘thousandth’ is the third decimal place as can be seen from the place value table.
REMEMBER:
Words with ‘th’ is for decimal place.
‘t,h,th is Tenth, Hundredth, Thousandth’
METHOD
Example: Convert thirty tenth to number form
Step1: UNDERLINE whole number and double underline ‘th’ words.
thirty tenth
Step2: WRITE: 0 . t, h, th
Step3: PUT whole number with last digit at tenth
0 . t, h, th
3. 0 (replace 0 if number ‘spill over’)
Example
Convert thirty-three thousandths to words
Step1: UNDERLINE whole number and double underline ‘th’ words.
thirty-three thousandths
Step2: WRITE: 0 . t, h, th
Step3: PUT whole number with last digit at thousandth
0 . t, h, th
0 . 0 3 3
WORD TO NUMBERS (Whole number and decimal)
If there are whole numbers and decimal, ‘breaks’ the words and ‘add’ back.
Example:
Write 4 hundred, 5 tenths and 6 thousandths in number form.
Step1: Underline whole number and double underline ‘th’ words.
4 hundred, 5 tenths and 6 thousandths
Step2: Write: 0 . t, h, th
Step3: Arrange numbers below “: 0 . t, h, th” and Add the numbers
(4 hundred to use whole number method)
0 . t, h,th
400 .
0 . 5
+ 0 . 0 0 6
400 . 5 0 6
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