Articles

Rounding and Estimates Course

– Rounding and estimating are math strategies used for approximating a number.
– To estimate means to make a rough guess or calculation.
– To round means to simplify a known number by scaling it slightly up or down.
Example:
$\ 73\  + \ 69\  \cong \color{red}{140}$
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Whole Number Addition and Subtraction Course

1– Line up the numbers.
2– Start with the unit place. (ones place)
3– Regroup if necessary.
4– Add or subtract the tens place.
5– Continue with other digits.
Example:
$231\  + \ 120\  = \ 351$
$292\  – \ 90\  = \ 202$

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Rounding Course

Rounding is putting a number up or down to the nearest 10 and the nearest hundred, etc.
Rounding means making a number simpler but keeping its value close to what it was.
Example:
$64$ rounded to the nearest ten is $60$, because $64$ is closer to $60$ than to $70$.
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Place Value Course

The value of the place, or position, of a digit in a number.  digits have different values depending on their place. Each place value is one-tenth of the place value to the left and ten times the place value to the right.
 
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Printable worksheets on Comparing Numbers. You can access all of them for free. This versatile worksheets can be timed for speed, or used to review and reinforce skills and concepts.
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Printable worksheets on Solving Systems of Equations by Substitution. You can access all of them for free. This versatile worksheets can be timed for speed, or used to review and reinforce skills and concepts.
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Printable worksheets on Rounding and Estimates. You can access all of them for free. This versatile worksheets can be timed for speed, or used to review and reinforce skills and concepts.
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Printable worksheets on Whole Number Multiplication and Division. You can access all of them for free. This versatile worksheets can be timed for speed, or used to review and reinforce skills and concepts.
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Printable worksheets on Whole Number Addition and Subtraction. You can access all of them for free. This versatile worksheets can be timed for speed, or used to review and reinforce skills and concepts.
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Printable worksheets on Rounding. You can access all of them for free. This versatile worksheets can be timed for speed, or used to review and reinforce skills and concepts.
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