Transcript 12. 2: Solving Rate Problems

3.10 (Parentheses) in Number
Sentences
Homework Review
Mental Math
Find the quotients to make each number sentence true.
12/2 = _____
10 ÷ 10 = _____
49/7 = _____
27 ÷ 3 = ____
720/9 = ____
8,100 ÷ 90 = _____
Math Message
Write your defense in your Math Notebook.
PARENTHESES
show which operation to do first.
Help me insert the parentheses to make each
number sentence true.
Working through Number Sentences with
Parentheses
Rewrite each sentence below the original one
with the term in the parentheses simplified.
Let’s try some more…
Rewrite each number sentence on your
whiteboard.
Insert parentheses to make each number
sentence true.
True or False…You Decide
Math Journal Partnership Work p 71.
Part 1 Sample
Problem:
Part 2 Sample Problem:
The result is 16 because 16 is
What operation do you the product of 2 and 8. 8 is the
difference of 15 and 7.
do first?
Why?
What was done first?
What was done second?
What should you do
Where do we insert parentheses?
Part 3 Sample Problem:
Use all three numbers and parentheses to get the
target number.
Tonight’s Homework
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