# Order of Operations

**Posted:**June 11, 2013

**Filed under:**MTH145, MTH148, MTH173, Numbers, Numbers, Review |

**Tags:**adding and subtracting, BEDMAS, Carruthers, mathcasts, multiplication and division, order of operations Leave a comment

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# Subtraction of Mixed Fractions

**Posted:**June 11, 2013

**Filed under:**Fractions, Fractions, MTH145, MTH148, MTH173, Review |

**Tags:**Carruthers, fractions, mathcasts, mixed fractions, subtraction Leave a comment

# Unit Conversion using Algebraic Substitution

**Posted:**February 4, 2013

**Filed under:**Application of Skills, Measurement, Measurement, MTH145, MTH148, MTH173 |

**Tags:**algebra, Algebraic Substitution, conversion, Unit Conversions Leave a comment

It was great that my Chair, Iain McNab, was able to join us for our screencasting day. This is a great example of how different approaches may make more sense to different students, depending on their thinking.

# Direct Variation – both methods

**Posted:**January 29, 2013

**Filed under:**Application of Skills, MTH145, MTH148, MTH173, Ratio & Proportion, Ratio & Proportion |

**Tags:**direct, mathcast, variation Leave a comment

Given y is directly proportional to x and y46 when x62, find y when x17.

# Order of operations – BEDMAS

**Posted:**January 29, 2013

**Filed under:**Equations & Word Problems, MTH145, MTH146, MTH148, MTH173, Numbers, Numbers, Review |

**Tags:**BEDMAS, expressions, instructor, mathcast, order of operations Leave a comment

An explanation of how order of operations BEDMAS is used to simplify mathematical expressions.

# Percent – Given part and total, what is percentage?

**Posted:**January 29, 2013

**Filed under:**MTH145, MTH148, MTH173, Percentages, Percentages, Review |

**Tags:**mathcast, percentage, proportion Leave a comment

Percent proportion question to find the percentage.

# Proportions – Solving for the variable

**Posted:**January 29, 2013

**Filed under:**Application of Skills, MTH145, MTH148, MTH173, Ratio & Proportion, Ratio & Proportion |

**Tags:**cross-multiplication, mathcast, proportions, variable Leave a comment

Student solution for solving for x in a proportion by cross-multiplication.