Oldest

Basic Addition

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851
07:43

Basic Subtraction

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832
08:32

Adding Mixed Numbers

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1028
02:05

Adding Mixed Numbers with Unlike Denominators

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818
05:15

Adding Mixed Numbers Word Problem

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786
03:21

Subtracting Mixed Numbers

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897
03:58

Subtracting Mixed Numbers 2

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883
04:53

Multiplying Mixed Numbers

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1651
04:20

Dividing Mixed Numbers

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1052
02:40

Converting Repeating Decimals to Fractions 1

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924
04:02

Converting Repeating Decimals to Fractions 2

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816
09:05

Writing proportions

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790
05:50

Find an Unknown in a Proportion

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889
07:19

Find an Unknown in a Proportion 2

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820
05:47

Thomas Young's Double Slit Experiment

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744
07:32

U-substitution with ln(x)

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785
03:38

U-substitution Example 3

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674
05:32

U-substitution example 2

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663
04:03

U-substitution

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661
05:10

Trapezoidal approximation of area under curve

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699
08:26