November 05, 2014
+
-
x
Real-life words
that mean...
Practice problems
November 05, 2014
1-6
Solving Problems with Rational Numbers
November 05, 2014
Let's review:
Order of Operations
-2 + 3(9) - 4 + (-2)/(-2)
November 05, 2014
November 05, 2014
Thomas works as an underwater
photographer. He starts at a depth of 20 feet,
ascends 9 feet, descends 12 feet, and then
descends 15 feet more. Write and simplify an
expression to find his final depth.
What do the words mean??
What are some problem solving strategies?
November 05, 2014
Discuss with partner:
How can you tell that the final depth for Thomas
will be deeper than -20 feet without doing any
calculations?
November 05, 2014
I do, you watch
One share of Mountain computers starts
trading at $6 at the beginning of the day, the
price goes up by $3, goes down $2.25, goes
down by $1.50, goes up by $3.75, then
goes down by $5. Write and simplify an
expression to find the closing price of one
share at the end of the day.
November 05, 2014
I do, you help
Anna is collecting samples in a cavern and
starts 40 feet underground. She ascends 11
feet, descends 13 feet, descends 5 feet, and
ascends 18 feet. Write and simplify an
expression to find her final location.
November 05, 2014
you do, I help
The table gives the daily high temperature for one week. Find the
average daily high temperature for the week. Round your answer to
the nearest tenth.
Day
Temp
T
M
-4.5
-3
W
2
Th
-1.5
F
-2
S
3
s
-5
November 05, 2014
you do, I watch
Marcy is digging a hole to plant a tree. She digs 1 foot below ground
each day for 5 days. Write and simplify an expression to show the
total number of feet that she dug below ground.
November 05, 2014
The table gives the daily high temps for the winter for one week.
Find the average daily high temperature. Round to the nearest
tenth.
Day
M
Temp 6
Tu
W
Th
F
S
S
2
0
-6
-2
5
-5
November 05, 2014
A chef adds 1/2 cup of stock to a stew 5 times while it is cooking.
During this time, he also removes 3/4 cup of stew 4 times to serve
his guests. Write and simplify an expression to find out how much
overall the soup amount increased or decreased.
November 05, 2014
A chef adds 1/4 cup of stock to soup 7 times while cooking. He
removes 1/8 cup 3 times to taste it. write and simplify an expression
to find out how much overall the soup amount increased or
decreased.
November 05, 2014
Journal Time!
How do you solve multi-step problems with
rational numbers? What are some
strategies you use??
How is my knowledge of signed rational
numbers (positive/negative numbers)
important in solving real-world problems?