Say it With Symbols

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Say it With Symbols
Before Class Work

• Math Reflections
• Investigation 1

2
When an expression involves addition,
subtraction, and multiplication, in what order
should you perform the order of operations?
p 100 10a - 8c
p (100 10)a - 8c
3
When an expression involves division and other
operations such as addition, subtraction, and
multiplication, in what order should you perform
the order of operations?
A 2.50V 500 V
A 2.50V 500 V
4
When an expression involves exponents and other
operations such as addition, subtraction, and
multiplication, in what order should you perform
the order of operations?
2
A 2.50V 500
2
A (2.50V 500)
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Say it With Symbols

• Math Reflections
• Investigation 1
• Answers

6
When an expression involves addition,
subtraction, and multiplication, in what order
should you perform the order of operations?
p 100 10a - 8c
p (100 10)a - 8c
Multiplication is performed before addition and
subtraction unless there are parentheses around
addition or subtraction.
7
When an expression involves division and other
operations such as addition, subtraction, and
multiplication, in what order should you perform
the order of operations?
A 2.50V 500 V
A 2.50V 500 V
If part of the problem needs to be divided, do
any multiplication and division from left to
right first. If the entire problem is being
divided, division will be the last step.
8
When an expression involves exponents and other
operations such as addition, subtraction, and
multiplication, in what order should you perform
the order of operations?
2
A 2.50V 500
2
A (2.50V 500)
Unless there are parentheses around the section
being raised to a certain power, exponents are
performed before any of the four operations..
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Say It With Symbols Investigation 2.1 Tiling
Pools Page 20-21
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Tiling Pools

• Hot tubs and in-ground swimming pools are
  sometimes surrounded by borders of tiles. This
  drawing shows a square hot tub with sides of
  length 5 feet surrounded by square border tiles.
  The border tiles measure 1 foot on each side. A
  total of 24 tiles are needed for the border.

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Name
TG
4/26/06
Make sketches on grid paper to help you figure
out how many tiles are needed for the borders of
square pools with sides of length 1, 2, 3, 4, 6,
and 10. Record your results in a table.
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Make sketches on grid paper to help you figure
out how many tiles are needed for the borders of
square pools with sides of length 1, 2, 3, 4, 6,
and 10. Record your results in a table.
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Tiling Pools

• Write an equation for the number of tiles, N,
  needed to form a border for a square pool with
  sides of s feet.

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Tiling Pools

• Write a different equation for the number of
  tiles, N needed for the border of the pool with a
  side length of s feet.

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Tiling Pools

• Is the relationship between the side length of
  the pool and the number of tiles linear,
  exponential, quadratic or none of the above?