"High achievement always takes place in the framework of high expectation." - Jack Kinder
Math 7 - Pre-Algebra
Click on the image to go
to the online textbook.
7th Grade Curriculum
Mathcounts Problem-Solving
Algebraic Expressions
Integer Operations
Solving Equations and Inequalities
Using Equations to
Solve Word Problems
Cartesian Coordinates
and Slope
Proportion and Percent
Number Theory
Square Roots
Probability
Facts about 7
7 is a prime number because
it has exactly two factors, 1 and 7.
7 is the only prime which is
one less than a perfect cube :
7 = 2x2x2 –1
There are 7 primes less than 77
that have at least one digit being 7:
7, 17, 37, 47, 67, 71, 73
There are 7 letters in TUESDAY, which is
the only day of the week whose name
contains a prime number of letters.
The sum of the 7 primes beginning with 7
is 7 times the 7th prime.
7+11+13+17+19+23+29=119=7x17
Using A = 1, B = 2, ..., Z = 26, the sum
of all the letter values in the word names
of the numbers from 1 to 7 is a prime (367).
If 0 is included, the sum is yet another prime (431).
Double 7! to get the exact number
of minutes in a week (7 days).
7 is the smallest integer that is not the difference of two primes
7 is the number of visible colors
formed by light across a prism.
There are 7 different notes
in a standard major scale in music
as well as in a standard minor scale.
7 is the sum of the numbers on
opposite sides of a standard die.
If asked to quickly pick a number between
12 and 5, most people will choose 7.
7 is the first prime happy number.
Replace a number by the sum of
the squares of its digits, and repeat the process until the number equals 1,
or it loops endlessly in a cycle
which does not include 1.
Those numbers for which this process
ends in 1 are called happy numbers.
There are exactly 7 prime happy numbers
less than 100. Can you find all 7?
7x7=49
4x4+9x9=16+81=97
9x9+7x7=81+49=130
1x1+3x3=1+9=10
1x1+0x0=1+0=1
Learn facts about your favorite number
at these websites:
Zoo of Numbers
Number Gossip