TOOL CHECK
Understand
Variables in
Algebra
(B)
Unit 10 Lesson 2
In the expression 9 × ▲, the symbol
▲ can be replaced by a variable, such
as b. Like a symbol, a variable stands
for an unknown value.
Which fraction is equivalent to 2/5 ?
Which expression will give the closest estimate to the answer
for
1,900 × 17?
What is the value of 32?
A quadrilateral has angles that measure 87°, 69°, and
104°. What is the measure of the fourth angle?
Look how many different ways the equation
3 × 4 = 12 is represented on-screen. You can do that, too!
You can write expressions multiple ways:
Show the expression in another way:
9Xh
3Xz
Show the expression in another way:
6XC
5Xb
Show the expression in another way:
2m
6t
There are 6 muffins in a tin. If there are an unknown number of
tins, the expression 6t could be written to show how many muffins
are in t tins.
Which expression represents the sum of 47 and
an unknown number?
Which expression represents 24 multiplied by an
unknown number?
Which expression represents the quotient of 45 and an
unknown number?
Meg had 6 more pennies than Dennis. Which expression
shows how many pennies Meg had?
Bobby had some money. He spent $45 at the store.
Which expression shows how much money Bobby has
now?
Matt had some peaches. He put an equal number of
peaches into 4 bags. Which expression shows the
number of peaches Matt put into each bag?
Dora spent $45 and has $32 left. Which equation can
be used to calculate how much money Dora had at
the beginning?
Tina bought 5 times as many tulips as Willa. Tina
bought 35 tulips. Which equation can be used to
calculate the number of tulips Willa bought?
Questions??