Download Multiplication Patterns • Squares • Area • Square Roots

MULTIPLICATION PATTERNS •
SQUARES • AREA • SQUARE ROOTS
BY: Philip Collins
Created for Mathese-2D 2007
VOCABULARY

Array-------numbers or symbols arranged in row
or columns

Area---------number of square units needed to
cover a surface.

Row-------a line in the horizontal

Column-------a line in the vertical
VOCABULARY CONTINUED


square root--------one of two equal factors of a
number.
square number--------The product when a whole
number is multiplied by itself.
MULTIPLICATION PATTERNS


One way to think of multiplication patterns is by
using an array.
Remember that an array is an arrangement of
numbers or symbols in columns or rows.
ARRAYS

6 columns
XXXXXX
XXXXXX

2 rows
This array is a collection of 2 rows and 6 columns
XXXXX
XXXXX
XXXXX
XXXXX
How many rows does this array have?__________
How many columns does this array have?_______
How many X’s are in this array?_____
XXXXX
XXXXX
XXXXX
XXXXX
 What multiplication problem can we make with
this array?
 Because we have 4 rows and 5 columns
 We make the problem 4 x 5 = 20
Let’s practice
 array pattern

AREA
What would the area if this shape be?

Lets say that each side of a small square is 1 cm.

There are four rows
1
2
3
4

and five columns
1
2
3
4
5
We will multiply 4 and 5.
The answer
1
will be written
in square units.
2
We are using
cm so the
3
answer will be
4
2
3
4
5
20 square cm
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
REVIEW AREA LESSON
Area lesson
SQUARES AND SQUARE ROOTS

A square is a rectangle that has equal sides.
1
1
2
2 by 2
2
1
2
2
3 by 3
3
3
If a shape is 3 by 3, then we can say that it has a
square number of 9. Because 3x3=9. We will write
the number under square root sign. It means the
square root of. If a problem asks for the square root
of 9 then we
think of the
1
2
3
Problem 3x3.
Our answer
will be 3.
4
7
9
5
6
8
9
SOLVE THE PROBLEMS
Lets Practice
 square root problems
