Algebra Skills

advertisement
Math
Unit 2 Skills
Name ___________________________________ Student # _____
(multiplication)
My Knowledge Key:
Skill
4 – I could teach this to the class
3 – I understand this, but made some careless errors
2 – I’m starting to understand, but still get confused
1 – I don’t understand this at all
My Knowledge
A Sample Problem
Draw base ten blocks to show:
7 x 10=
I can represent
multiplication problems
using base ten blocks.
I can use arrays to
multiply by 10 and 100
4 3 2 1
3 X 100=
4 3 2 1
Write a multiplication number sentence that you
could use to represent this illustration.
_______________________________________
Write an addition number sentence that you could
use to represent this illustration.
______________________________________
Solve the following:
I can multiply by
multiples of 10 and 100
I know that
multiplication is the
same as repeated
addition
I can solve single step
multiplication word
problems
I can use rounding to
estimate products.
4x8=
4x5=
4 x 80 =
4 x 50 =
4 x 800 =
4 x 500 =
4 3 2 1
Write the multiplication equation that represents each
expression below:
4 3 2 1
2+2+2+2
____________________
9+9+9
____________________
Mrs. Darnley bought 9 boxes of suckers. Each box
contained 60 suckers. How many suckers did she
buy?
4 3 2 1
4 3 2 1
Justin receives $36 a month for shoveling driveways.
Write an equation you could use to estimate how
much money he would earn in 9 months.
________________________________
I can use estimation
to decide if the answer
to a problem
is reasonable
4 3 2 1
Jill and Linda are making gingerbread houses for a
good citizens project at school. If they can make 23
houses per day. Jill says that they will have 200
gingerbread houses at the end of the week. Is Jill’s
statement reasonable? Explain.
Use partial products to multiply:
56 x 3 = ________
I can use partial
products to multiply
2-digit, 3-digit &
4-digit numbers by
1-digit numbers
498 x 5 = ________
4 3 2 1
3,187 x 6 = ________
24 x 35 = ________
I can use partial
products to multiply
2-digit numbers by
2-digit numbers
4 3 2 1
I understand how to use
the distributive property
4 3 2 1
(5 x 4) + ( 5 x 5) = 5 x _____
7 x 82 =
I can use the distributive
property to multiply
a 1-digit number
by a 2-digit number
_______ x _______ = __________
4 3 2 1
_______ x _______ = __________
_________ + _________ = __________
Show how you can use the distributive property to
find 742 x 6 =
I can use the distributive
property to multiply
a 1-digit number
by a 3-digit number
6 x 742
4 3 2 1
( ____ x ____ ) + ( ____ x ____) ( ____ x ____ )
( ______ ) + ( ______ ) + ( ________)
________________
I can multiply 2, 3, and
4-digit numbers by
1- digit numbers using
the traditional method
of multiplication
I can use the traditional
alogorithm to multiply
2-digit numbers by 2digit numbers
Identify the information
needed to solve a word
problem and eliminate
information that is not
needed
4 3 2 1
74
x 6
x
468
x
7
24
36
x
5,678
x
9
94
51
4 3 2 1
4 3 2 1
In order to raise money for Food Pantry, Gloria
plans to sell bags of popcorn after the chorus
concert. A ticket to the concert costs $1. She will
pop 150 bags of popcorn. There will be 200 pieces
of popcorn in each bag. She hopes that at least 500
people will attend the chorus concert. She plans to
sell the popcorn for $2 per bag. If she sells all of the
popcorn, how much money will Gloria raise for the
Food Pantry? Hint: remember CUBES!
Sarah plans on reading 30 pages per day in her
book. If she reads 7 days per week for 4 weeks, how
many pages will Sarah read all together?
Solve multi-step
word problems
I can use compensation
to multiply mentally.
4 3 2 1
Alex drove his motorcycle 807 miles each month for
4 months. How many miles did he ride in all?
(hint: estimate, multiply, adjust)
4 3 2 1
Write an expression that could be used to check each
of the following equations below.
I know that division
is the inverse property
of multiplication.
4 3 2 1
30 ÷ 5 = 6
________________
72 ÷ 8 = 9
________________
Download