710 231 In Expanded Form
Expanded Note – The Fashion to Expand Numbers
What does Expanded Notation Mean?
Expanded note tin can exist defined as a fashion of expressing numbers by showing the value of each digit. Writing a number in expanded notation is not the same as writing in expanded form.
In expanded annotation, a number is represented equally the summation of each digit multiplied by its place value, whereas in expanded form, addition is only used between place value numbers. For case:
234 in expanded grade:
= 200 + 30 + 4
while 234 in expanded notation:
= (2 x 100) + (3 x 10) + (4 10 ane)
The original course of the number '234' is chosen a standard form.
How to do Expanded Notation?
To expand a item number (from its standard class), nosotros demand to aggrandize information technology into the sum of each digit multiplied by its matching identify value (ones, tens, hundreds, and so on).
These methods of writing a number in expanded notation and forms are illustrated in the examples below.
Example 1
Write 4,981 in expanded form?
Solution
The number four,981 can be written in expanded class as:
four,981 = 4,000 + 900 + eighty + 1
In this method, every number that comes later on a digit is replaced with zeros. For case, 4 and 9 in the number are represented as 4000 and 900 respectively.
Example 2
Write 15,807 in expanded form?
Solution
15,807 in expanded grade is represented equally:
fifteen,807 = 10,000 + 5,000 + 800 + 7
In this example, the place value of 0 in the number is zilch; therefore, the value in the tens digit is not represented because there are no tens.
Writing a number in expanded note entails showing the place of a number in exponential powers of ten.
Example three
Write the expanded notation of: four,981
Solution
iv,981 = (4 x 1,000) + (ix x 100) + (8 x ten) + (1 x i)
= (4 x 10 three) + (ix x ten 2) + (8 x x 1) + ( i x x 0)
Example iv
Write 15,807 in expanded notation?
Solution
fifteen,807 = (one x ten,000) + (5 x 1,000) + (8 x 100) + (vii x 1)
= (ane x ten 4) + (5 x 10 3) + (8 x 10 2) + (7 x 10 0)
Example 5
Write the thousands, hundreds, tens and ones for each of the following numbers:
a. 945
945 = 9 hundreds + iv tens + 7 ones
= 900 + 40 + five
b. 458
458= iv hundreds + 5 tens + 8 ones
= 400 + 50 + 8
c. 5973
5973 = 5 thousands + 9 hundreds + 7 tens + iii ones
= 5000 + 900 + 70 + 3
d. 333
333 = 3 hundreds + iii tens + 3 ones
= 300 + thirty + 3
e. 789
789 = 7 hundreds + 8 tens + 9 ones
= 700 + 80 + 9
Expanded Notation with Decimals
Decimal numbers can besides exist written in expanded notation by using exponential powers of x.
Example 5
Write 96. 24 in expanded note?
Solution
96.24 = 90 + 6 + 0.two + 0.04
(9 x ten) + (half dozen 10 one) + (3 x 10 -1) + (4 10 x -ii)
Case 6
Write the decimal number 536.072 in expanded note.
Solution
536.072 = 500 + 30 + 6 + 0.07 + 0.002
(v x x two) + (three ten 10 1) + (six ten 10 0) + (7 x ten -ii) + (2 x ten -3)
Exercise Questions
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710 231 In Expanded Form,
Source: https://www.storyofmathematics.com/expanded-notation/
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