Label an Expression
The part of an expression in front of the base is called ______.
Ex: "9.2" in 9.2 x103
coefficient
When you add two expressions in scientific notation, the exponents must be ______.
The same! Equal!
Ex: (3.1 x104) + (5.6 x 104)
(9.5 x103) - (8.6 x106)
-8.5905 x106
Write in standard form:
4.47 x10-9
.00000000447
(8 zeros)
What is Ms. Walkuski's favorite day of the week?
Thursday
The part of an expression being raised to a power.
Ex: "10" in 9.2 x103
base
True or False:
When you subtract two expressions in scientific notation, exponents must be the same.
True!
Adding AND Subtracting in scientific notation requires equal exponents!
(9.8 x107) - (2.3 x109)
-2.202 x109
Write in scientific notation:
.000000019
(7 zeros)
1.9 x10-8
What food could Ms. Walkuski eat every day for the rest of her life & never get tired of it?
Bagels & cream cheese
The part of an expression that is a power
Ex: "3" in 9.2 x103
exponent
When an exponent INCREASES, you must do what to the decimal point?
Move it LEFT the same number of spaces you increased the exponent by.
Exponent increases = Coefficient decreases
(1.31 x106)(3.09 x103)
4.0479 x109
Write in scientific notation:
5,230,000,000
5.23 x109
Office hours with Ms. Walkuski start at what time each school day?
8 AM
Moving a decimal of a coefficient to the RIGHT will make the coefficient INCREASE or DECREASE?
Increase!
9.2 with the decimal moved 2 places right becomes 920
When an exponent DECREASES, it is because what happened to the coefficient?
The decimal was moved RIGHT and the coefficient INCREASED.
Coefficient increases = Exponent decreases
(7.5 x1010) x (4.9 x 107)
36.75 x1017 = 3.675 x1018
Write in scientific notation:
.00009214
9.214 x10-5
True or False:
Ms. Walkuski has one sibling.
True!
A younger brother.
Moving a decimal of a coefficient to the LEFT with make the coefficient INCREASE or DECREASE?
9.2 with the decimal moved two places left will be .092
What are the two steps when multiplying two expressions in scientific notation?
Ex: (1.56 x104)(7.1 x107)
1) Multiply coefficients
2) Add exponents
Ex: (1.56 x104)(4.1 x107) = 6.396 x1011
(11.8 x103) + (27.5 x104)
28.68 x104 = 2.868 x105
Write in standard form:
6.2 x104
62000
You are brave for choosing Free For All 500 ...
automatic +500 for you, and +200 for all other players
Seriously!
+500 for you
+200 for all other players