Transcript 7th Grade Math

th
7
Grade Math
Week of 9/15/14
Information from : http://net.cmsdnet.net/schools/math/sld005.htm
http://www.mathsisfun.com/adding-decimals.html
Monday: Bell Work
1)–7t + 2 = 16
2)–25 = 7h + 3
* Solve the equations
19. Difference
What does this
word mean to
you?
This word actually
means…..
the result when 2
numbers are
subtracted.
Examples…
Explain how
you would use
this word in
math.
20. Factor
What does this
word mean to
you?
Examples…
This word actually
means…..
a number that is
multiplied by another
number to get a product.
Explain how
you would use
this word in
math.
2- Step Equation
... use patterns and properties to explore,
develop properties and describe real-world
situations represented by the multiplication
or division of integers? (7.NS.2a)
Properties foldable
1 piece of paper needed!!
Foldable
Cut this
section
off
Foldable
Fold in
1/2
Foldable
Cut 3
lines to
make
4 flaps
Foldable
Commutative
Identity
Associative
Distributive
Identity Property
Commutative
Distributive
Associative
HW
Worksheet
Identify the property being shown
Exit / Closure
• How do inverse operations have an impact
upon equations?
Tuesday: Bell Work
1) a + 5 = 8
4
2)
Solve the equations
Have homework on desk ready to check
21. Equivalent
What does this
word mean to
you?
This word actually
means…..
having the same
value.
Examples…
Explain how
you would use
this word in
math.
Lesson
• ... solve real-world problems
involving the addition, subtraction,
multiplication, and/or division of
rational numbers? (7.NS.3)
Adding Decimals
Subtracting Decimals
Exit / Closure
In math, what is the definition of additive
inverse. When do you see additive
inverse being used?
Wednesday: Bell Work
1) Danielle spent $35 on a magazine and
some notepads. If the magazine cost $3
and each notepad cost $4 then how
many notepads did she buy?
*Write and solve the 2-step equation. The
variable cannot be in the answer.*
22. Inequality
What does this
word mean to
you?
This word actually
means…..
two values or
quantities that are
not equal.
Examples…
Explain how
you would use
this word in
math.
How to Multiply Decimals
Just follow these steps:
Multiply normally, ignoring the decimal
points.
Then put the decimal point in the answer - it
will have as many decimal places as the
two original numbers combined.
Lesson
• ... solve real-world problems
involving the addition, subtraction,
multiplication, and/or division of
rational numbers? (7.NS.3)
Exit / Closure
• Why is it important to line the decimals up
with adding or subtracting? How does this
relate to your knowledge of place value?
Thursday: Bell Work
1) Jamie
had $20 to spend on seven raffle
tickets. After buying them she had $6. How
much did each raffle ticket cost?
Write and solve the 2-step equation. The
variable cannot be in the answer.*
23. Contextual
What does this
word mean to
you?
This word actually
means…..
using words to
explain the meaning
of a statement.
Examples…
Explain how
you would use
this word in
math.
24. Compare
What does this
word mean to
you?
Examples…
This word actually
means…..
measure the similarities
and/or differences
between quantities.
Explain how
you would use
this word in
math.
Lesson
• ... solve real-world problems involving
the addition, subtraction,
multiplication, and/or division of
rational numbers? (7.NS.3)
• N2K 3
Critical Thinking Activity
5. Select the most accurate decimal form
for the fraction 2/9.
_
A) 0.2
B) 2.9
C) 0.2
D) 4.5
• WB p. 102
Constructed Response
5. Arianne was given the fraction 13/8 and was told to
convert it into its decimal form. Her work is below:
___.1625___
8 ) 13
-8
50
-48
20
-16
40
-40
0
She got the decimal 0.1625 for the decimal. Is she
correct? Use estimation to justify your answer.
Exit / Closure
• What is the importance of checking your
work in math?
• Discuss with a partner
Friday: Bell Work
Ashley spent half of her weekly allowance
playing mini-golf. To earn more money her
parents let her wash the car for $9. What is
her weekly allowance if she ended with
$15?
*Write and solve a 2-step equation.
***notes for Agenda
Word Wall Vocabulary Quiz – Monday 9/22
Benchmark – Monday 9/29
Ch 3 Test – Friday 10/3
25. Convert
What does this
word mean to
you?
This word actually
means…..
to express a value in
another form.
Examples…
Explain how
you would use
this word in
math.
Lesson
• ... solve real-world problems involving
the addition, subtraction, multiplication,
and/or division of rational numbers?
(7.NS.3)
Dividing Decimals
Dividing a Decimal Number by a Whole
Number
To divide a decimal number by a whole
number:
Use Division or Long Division (ignoring the
decimal point)
Then put the decimal point in the same spot
as the dividend (the number being divided)
Dividing by a Decimal Number
But what if we want to divide by a Decimal Number?
The trick is to change the number we are dividing by to a
whole number first, by shifting the decimal point of
both numbers to the right:
Now we are dividing by a whole number, and can
continue as normal.
It is safe to do this if we remember to shift the decimal point
of both numbers the same number of places.
Exit / Closure
• Tommy said that 4 + 2 x = -24
x is 14.
• Justify whether Tommy is incorrect or
correct.
• ***Be ready to explain your answer to a
partner.