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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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Solving Systems of Equations by Substitution Course

Consider the system of equations
\( x\  – \ y\ = \ 1\ –\ 2\ x\  +\  y \ = \ 6\)
Substitute \(\ x\  = \ 1\  –\ y\ \) in the second equation
\( -2(\ 1\ -\ y\ ) + y = 5 y = 2\) 
Substitute\(\ y\  = \ 2\  in \ x\  = \ 1\  +\  y\)
\(\ x\  = \ 1\  + \ 2\  = \ 3\)
Example:
\( –\  2\ x\  –\  2\ y\  = -\ 13\)
\( –\  4\ x\  +\  2\ y\  = \ 10\)
\((\ 0\ .\ 5\ ,\ 6\ )\)
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Whole Number Multiplication and Division Course

Multiplication:
– Learn the times tables first!
– For multiplication, line up the numbers you are multiplying.
– Start with the ones place.
– Continue with other digits
– A typical division problem:
Dividend \(  \div \) Divisor\(  = \) Quotient
Division:
– In division, we want to find how many times a number (divisor) is contained in another number (dividend).
– The result in a division problem is the quotient.
Example:
\(\ 200\  \times \ 90\  = \ 18,000\)
\(\ 18,000\  \div \ 90\  = \ 200\)
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