7th Math
Sec 10.1 Squares and Square Roots
Name:
Date:
An _____________________ tells how many times a number, called the ______________, is used as a
__________________.
Ex) 75
Means:
Today, we are only going to look at squares of numbers. In particular, we will focus on _______________
___________ because they are squares of whole numbers.
Evalute.
1) 7 2
2) 52
3) 122
4) 232
Here is a list of perfect squares (also sometimes just called “perfects”) that you need to KNOW!
12  1
22  4
32  9
4 2  16
52  25
6 2  36
7 2  49
82  64
9 2  81
10 2  100
112  121
12 2  144
132  169
14 2  196
152  225
The symbol,
, is called a ___________________ ____________ and it “undoes” squaring a number.
You might think: “What number times itself equals the number under the radical?”
Find each square root.
1)
9
2)
36
3)
121
4)
81
Homework:
Find the square of each number.
Find each square root.
1) 9
11)
4
12)
64
13)
16
2) 4
3) 10
4) 8
14)
3600
15)
400
16)
2,500
17)
144
18)
169
19)
1
20)
100
5) 24
6) 30
7) 15
8) 40
9) 27
10) 13