20
Understanding Place Value
Place value is a basic element of a number system. A digit’s position, or place, in a number
determines the value of the digit. Each place represents ten times the place to its right. This is a base
ten system. The number shown below is seven trillion, eight hundred sixty-three billion, one hundred
fi fty-nine million, two hundred thirty-seven thousand, fi ve hundred eighty-four and one thousand eight
hundred seventy-fi ve ten thousandths.
Skills Workshop 4
See It
Write this number using digits: ten billion, fi ve hundred eighty-three million,
two hundred nineteen thousand, four hundred and sixty-three.
Step 1: The largest value in this number is billions (10).
Step 2: The next largest value is millions (583).
Step 3: The next largest value is thousands (219).
Step 4: The smallest value is hundreds (463).
Step 5: Compose the number separating the values with commas (10,583,219,463).
Check It
Write the following numbers in words.
1. 489,815
2. 1,347
3. 25,185,492,235.05
4. 13,034,765,192,486
5. 2.9375
Write the following numbers in digits.
6. ten thousand, four hundred and
fi fty-eight
7. thirty-seven and one hundred
eighty-fi ve thousandths
8. fourteen billion, one hundred
fi fty-six million, two hundred fi ve
thousand, eight hundred eleven
9. four hundred nineteen
thousandths
10. nine million, six hundred eighteen
thousand, seven hundred twenty-
one and ninety-eight hundredths
7,863,159,237,584.1875
Trillions Millions Hundreds
Billions Thousands
Whole Numbers Decimals
One
trillions
Hundred
billions
Ten
billions
One
billions
Hundred
millions
Ten
millions
One
millions
Hundred
thousands
Ten
thousands
One
thousands
Hundreds
Tens
Ones
Tenths
Hundredths
Thousandths
Ten
thousandths
Decimal
point