## Mrs. Alcuri's Class

186days since
School Starts

### Chapter 1

Use Place Value to Communicate

In this chapter you will learn to:

• Find patterns in numbers
• Read and write and identify place value of whole numbers to ten thousands.
• Compare and order whole numbers through ten thousands.
• Round whole numbers up to the nearest thousand.
• Use the four-step plan to solve problems.
• Find the value of coins and bills

digit -a symbol used to write numbers.

pattern -a sequence of numbers, figures, or symbols that follows a rule or design.

Place value -the value given to a digit by its place in a number

For example:  In 5,349 the 3 is in the hundreds place and has a value of 300.

Period- group of three digits separated by commas

Each place is tens times as big as the place to its right.  For example:

 Hundred Thousands Ten Thousands Thousands Hundreds Tens Ones 100,000 10,000 1,000 100 10 1

Standard form -a number written in numbers

For example: 34,567

Word name-a number written in words

For example: thirty four thousand, five hundred sixty seven

Expanded notation -the number written as the amount of each place value added together

For example:  30,000 + 4,000 + 500 + 60 + 7

You can also use place value blocks to create a number.  For example:

< (is less than), = (is equal to ), and > (is greater than) -symbols used when we compare amounts
For example:  65,763 > 43,836

When you compare numbers you start all the way to the left in the highest place value.  A good strategy to help you is if you turn a piece of lined paper sideways and use the lines to help you line up the numbers. Also, think of an alligator eating the bigger number.

Rounding means to change the value of a number to one that is easier to work with.  Rounded numbers end in one or more zeroes.  To round a number, underline the place you want to round to.  Look at the place to the right.  If the digit is 5 or more, raise the score of the underlined number.  If it is 5 or less, give the underlined number a rest and keep it the same.  Put zeroes in the places to the right of the underlined number.

For example: 37 is rounded to 40 because the 7 to the right of the 3 is more than five.  21 is rounded to 20 because the 1 to the right of the 2 is less than 5.

A bill is paper money.  A dollar is a unit of money that is equal to 100 cents or \$1.00.

EXTRA PRACTICE:

 Self-Assessments
Comments