Ten Minute Math
William’s father is a truck driver who has driven 1,741,253 miles
over a twenty-year period. How is this number written in word
form?
A.
B.
C.
D.
One billion, seven hundred forty-one thousand, two hundred
fifty-three
One million, seven hundred forty-one thousand, two hundred
fifty-three
Seventeen million, forty-one thousand, two hundred fiftythree
One hundred seventy-four thousand, two hundred fifty -three
Ten Minute Math
In his science class, Alex and his group members boiled a mixture of
salt and water. After the water evaporated, the mass of the salt
remaining was 0.30 kilograms. Which shaded area of the decimal
model represents the mass of the salt?
A.
B.
C.
D.
Ten Minute Math
Daniel has 3 one-dollar bills, 1 five-dollar bill, and 2 tendollars in his wallet. Which is a possible combination if
Daniel takes 4 bills from his wallet?
A.
C.
B.
D.
Ten Minute Math
Look at the group of number pairs below.
4 and 24
7 and 49
8 and 16
2 and 12
Which of the following number pairs could belong to this group?
A.
B.
C.
D.
3 and 16
9 and 36
5 and 54
6 and 21
Ten Minute Math
These are gibbitts.
U O M H A
Which of the figures below is a gibbitt?
A.
B.
C.
D.
B
Z
X
N
Silhouettes
• What is a silhouette?
• How is it produced?
Silhouettes
• What is this shape?
• That’s right...it’s a cube!
• If I was to place this cube
under the Elmo and shine the
light on it, what kind of
silhouette would it cast?
• Draw your prediction on the
desk.
Silhouettes
Did you draw this shape?
If you did, then you drew the correct shape.
Silhouettes
• What is this shape?
• That’s right...it’s a cylinder!
• If I was to place this cylinder
on one of its faces under the
Elmo and shine the light on it,
what kind of silhouette would
it cast?
• Draw your prediction on the
desk.
Silhouettes
Did you draw this shape?
If you did, then you drew the correct shape.
Silhouettes
• If I was to place this cylinder
on its curved side under the
Elmo and shine the light on it,
what kind of silhouette would
it cast?
• Draw your prediction on the
desk.
Silhouettes
Did you draw this shape?
If you did, then you drew the correct shape. If not, why do you
think the cylinder created a rectangle shape when it was laid on its
side?
Silhouettes
Many solids make more than one silhouette. Can you find a solid that
will make different silhouette depending on where the light is
positioned with respect to the solid?
Describe the solid to a shoulder partner and show the different
silhouettes it creates on your desk.
Interactive Math
http://www.fi.uu.nl/toepassingen/00208/toepassing_wisweb.en.html
Group Practice
• Look at Student Activity Sheet “Silhouettes of Geometric
Shapes”.
• Look at each shape and determine where if it makes a triangle,
circle, rectangle, etc.
• Remember, you each 3D shape could fit into several different
silhouettes.
Independent Practice
• Pass out Don’t Block My Shadow and Landscape 1 worksheets.