I find Khan solutions are unnecessarily complicated.
About this unit
In this unit, we start to think about some general modeling concerns before we dive into modeling situations with different kinds of functions and equations throughout the course.
Working with units 0/400 Mastery points
I did terribly wrong in this section.
- Rate conversion: Working with units
- Appropriate units: Working with units
- Word problems with multiple units
--Rate conversion: Working with units
I did wrong by confusing min/m vs. m/min.
--Appropriate units: Working with units
Oops, I am not good at money! This doesn't test math, so I skip this section.
--Word problems with multiple units
Why unnecessarily complicated?
A month's views: 150,000 * 3 = 450,000
9,000,000 /450,000m = 20 (Note: I get wrong answer 2, since I mistakingly take 9,000,000 to 900,000
4500 /300 = 15 trips, a truck takes 3 trips, thus, 15 / 3 = 5
Why so unnecessarily complicated?
72 * 0.2 /480 = 0.03 I get the wrong answer since I multiply 6, 0.03 * 6 = 0.18, but if I calculate total average
72 * 0.2 * 6 / ( 480 * 6 ) = 0.03
Thus, Family average is a really personal average, I find this very strange.
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