Download Cornell Notes: Dividing Decimals

Cornell Notes: Expressions
Topic: Students will be writing
and evaluating expressions.
Name: ___________________________________
Class/Teacher: __ ________________ Core: ________
Date: __________
Questions/Main Ideas
Grade: __6______
Notes/Examples
Write and evaluate numerical expressions involving wholenumber exponents.
Example 1: 4X4X4=43
Example 2: Evaluate: 20 - 62 ÷9 + 8
20 - 36÷9 + 8
20 - 4 + 8
16 + 8
24
Example 3: Evaluate the numerical expression
81− 25 = 81 - 32 = 49 = 1
72
49
49
Write expressions that record operations with numbers and with
letters standing for numbers.
Example 1: Write the numerical expression for the written
expression:
The sum of twenty-five and a number, divided by 3.
25 + n
3
Example 2: Write an algebraic expression for the following:
A piece of yarn that is x inches in length is cut into 8 equal pieces.
How long is each piece of string?
X
8
Identify parts of an expression using mathematical terms:
Term - A part of an algebraic equation or a number in a sequence
or a series or a product of real numbers and/or variables.
Coefficient - A factor of the term. x is the coefficient in the term
x(a + b) or 3 is the coefficient in the term 3y.
Constant - A value that doesn't change.
Example: 10x + 5y + 3z + 9
Which of the following is a true statement of the
expression above?
a) The expression is a product of 4 terms.
b) The expression has 2 variables
c) The expression has coefficients of 10, 5, 3, and 9
d) The expression has one constant term, 9.
ANSWER : d
Evaluate expressions at specific values of their variables.
Example 1: Evaluate the following expression for t = 2.
8∗6𝑡
8∗36
288
Example 2: Find the perimeter of the equilateral triangle.
4x
4x
4x
4x + 4x + 4x = 12x
Example 3: Evaluate the product of 𝑎5 + 3𝑏 when a=2 and b=4.
25 + 3(4)
32 + 12
44
Summary, Reflection, Analysis:
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