Rounding Numbers: Rounding to the Nearest Tenth
This clip explains the procedure used in rounding to the nearest tenth. "The place to look is the hundredths place," the clip explains. "If it's less than five, leave the tenths place unchanged and drop everything to the..
Rounding Numbers: Summary Example and an Exercise
This clip walks us through two examples of rounding with decimal numbers, then invites the student to, " try one yourself...(and) handle it like the problem we just finished." The clip then talks about the importance of..
Rounding Numbers: Summary: Rounding Numbers
This clip summarizes rounding numbers, explaining that, " we use rounded numbers either when it's not important to know the exact ones, or when we can't find them." The clip then explains when and how we round up or dow..
Rounding Numbers: What Are Rounded Numbers?
This clip explains what rounded numbers are and how they are commonly used. The clip states that, " when we talk of rounded numbers, we mean they're not exact."
Rounding Numbers: Why Use Rounded Numbers?
This clip explains that rounding is done when getting an exact measure either isn't important or isn't worth the trouble.
Signed Fractions: Adding Signed Fractions
This clip explains that the rules for working with signed fractions are exactly the same as for any other signed numbers. "Wherever you find the negative sign," the clips states, " move it out in front of the entire fra..
Signed Fractions: Dividing Signed Fractions
This clip explains that, when dividing signed fractions, the basic approach is the same as any operation with signed fractions. Once we figure out what's being divided into what, we divide the absolute values. And, in th..
Signed Fractions: Exercise on the Absolute Value of Fractions
This clip explains that, like signed whole numbers, signed fractions have absolute values " and they work in exactly the same way. For example, the absolute value of 6/7 is just that, 6/7, but the absolute value of nega..
Signed Fractions: Multiplying Signed Fractions
This clip explains that the freedom to move the negative sign out front makes multiplication of signed fractions exactly like multiplication of any signed numbers.
Signed Fractions: Solving Equations Whose Solutions Are Negative Numbers or Fractions
This clip explains that, now that we understand signed numbers and fractions, we can solve equations whose solutions are not necessarily whole numbers. The clip states that, " in general, it doesn't matter whether our e..