Prime Time:
Investigation 1: Factors And Products

Did You Know?
The Did
You Know? feature supports
Problems by providing interesting facts related to the context of the
Investigation.
The links below provide more information about each of these topics in your
textbook.
Factors
 FunSchool Math Popper Game
addition, subtraction, multiplication
 APlusMathArithmetic: +*/
 BBC
Bitesize Negative Numbers
 HoodaMath
 Multiplication.Com
 Coolmath
 Timernator
 Crazy
Taxi M12 This is one of
our most fun games. But, you REALLY have to know your times
tables to do well. Before each level, I run through my multiples
in my head!
 Math Lines This is just like our Marble Lines game, but we've made it an
addition game. You have to shoot the ball that makes the right
sum.
 Math
Lines: Xfactor
This is the same as Math Lines, but you need to really know your times
tables and higher multiples for this one.

Arithmetic
Game In this timed game, how fast can you
pick out numbers from the grid that complete the missing spots in an
equation?
 Make 15, Make 24 Compete against the computer to
see who can pick numbers that add up to 15 first.
 Math ManThis is a Pac Man type game, but
you have to eat the monster that solves the math equation.

Math
Search In this game, you're given an
arithmetic problem to solve... Once you find the answer, you have
to find it on the grid of numbers  like in a word search game.
 Number
BallsThis is
a pretty simple game. You just click on the balls following the
numbers on them from lowest to highest.
 Number
Monster This was the first game I ever
made. Really, it's more of a math practice thing than a
game. But, it makes practicing a lot more fun.
 Number
Twins This is like our game, Twins, but we put numbers on the
balls. You have to match up numbers (like in our game Shisen) to
make the correct sums.
 Subtraction
Blast I've played this game
until my arms were sore. It's great arithmetic practice while you
get to shoot stuff. Can life get much better than that?
 The
Timernator How fast can you do
arithmetic? Well, with this game, you can find out! See how
many addition, subtraction, multiplication and division problems can
you do in a minute?
 National Library of
Virtual Manipulatives


Number Line Bounce – Number line addition and
subtraction game. 

Number Puzzles – Solve puzzles involving arranging
numbers on a diagram so that they add up to a given value. 
 Cowboy Math Addition and
Multiplication

Prime Time
(University Of Michigan)
Concept
with Explanation
Selected
Homework from ACE
In Prime Time students will explore certain important properties of whole
numbers, especially those related to multiplication and division. The
investigations in this unit will help students to:
 Understand
relationships among factors, multiples, divisors, and products;
 Recognize
and use properties of prime and composite numbers, even and odd numbers, and
square numbers;
 Use rectangles to represent the factor pairs of numbers;
 Develop strategies for finding factors and multiples, least common
multiples, and greatest common factors;
 Recognize and use the fact that
every whole number can be written in exactly one way as a product of prime
numbers;
 Use factors and multiples to solve problems and to explain some
numerical facts of everyday life; and
 Develop a variety of strategies for
solving problems building models, making lists and tables, drawing diagrams, and
solving simpler problems.