Showing a Series Diverges using Partial Sums

By PatrickJMT

This video shows how a series diverges using partial sums.

Sums and products of irrational numbers

Thinking about whether the sums and products of irrational numbers are rational or irrational.

Decimals in words

Learn how to describe decimals in words.

Regrouping decimals

Similar to a problem we did earlier but with whole numbers, this time we're having to regroup with decimals and find the right answer. Take your time.

Rational and Irrational Sums

By Sarah Houlihan

This video explains what a rational number is, and what an irrational number is. The video also provides examples of addition between rational and irrational numbers.

Partial Sums Method

Use the partial sums method to carry out addition problems.

Partial Sums Algorithm

Using the partial sums method.

Sums and scalar multiples of linear transformations | Linear Algebra | Khan Academy

Sums and Scalar Multiples of Linear Transformations. Definitions of matrix addition and scalar multiplication.

SAT Math Strategy - Change Averages to Sums

By Dr.Steeve Warner

SAT Math Strategy - Change Averages to Sums

Area and Perimeter - Khan Academy

Start by learning how to calculate the perimeter and area of squares, rectangles, and triangles. Note the explanation of why perimeter measurements are in meters and area measurements are in square meters.

Sums and scalar multiples of linear transformations | Linear Algebra | Khan Academy

Sums and Scalar Multiples of Linear Transformations. Definitions of matrix addition and scalar multiplication.

Comparing decimals visually

Learn how to compare decimals using grid diagrams.

Comparing decimals example 3 | Decimals | Pre-Algebra | Khan Academy

We're using the less than (<) and greater than (>) symbols to compare decimals now. Cool!

Converting decimals to fractions example 3 | Decimals | Pre-Algebra | Khan Academy

Learn how to write 0.36 as a fraction.

Regrouping decimals

We're doing more regrouping but this time using decimals. Just remember those place values!

Converting decimals to fractions example 1 | Decimals | Pre-Algebra | Khan Academy

Learn how to convert 0.15 into a fraction.

Grade 4 Math - Compare Decimals

By Lumos Learning

Using the Lumos Study Programs, parents and educators can reinforce the classroom learning experience for children and help them succeed at school and on the standardized tests. Lumos books, dvd, eLearning and tutoring are used by leading schools, libraries and thousands of parents to supplement classroom learning and improve student achievement in the standardized tests.

Decimals on the number line 2

Learn how to find decimals with hundredths on a number line.