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LESSON 16.5
Name
Square Numbers
A square number is a number that is the product of any
number and itself. You can use a square array to find the
square of a number.
4 4 16
So, 16 is a square number.
4
4
The square root of a number is one of the two equal
factors of a square number. 16 is a square number.
Its two equal factors are 4. So, 4 is the square root of 16.
You can also find the square root of a number by using the
square array for the square number. The square root is the
length of one of the sides of the square.
The length of each side of the
square that shows 16 is 4.
So, 4 is the square root of 16.
4
4
Name the square number and the square root for each array.
1.
2.
3
3.
2
5
2
3
9, 3
5
25, 5
4, 2
5.
6.
© Harcourt
4.
16, 4
49, 7
36, 6
Find the square number.
7.
55
25
8.
99
81
9.
77
49
10.
11
1
11.
66
36
Reteach
RW87
LESSON 16.5
Name
Square Numbers
A square number is a number that is the product of any
number and itself. You can use a square array to find the
square of a number.
4 4 16
So, 16 is a square number.
4
4
The square root of a number is one of the two equal
factors of a square number. 16 is a square number.
Its two equal factors are 4. So, 4 is the square root of 16.
You can also find the square root of a number by using the
square array for the square number. The square root is the
length of one of the sides of the square.
The length of each side of the
square that shows 16 is 4.
So, 4 is the square root of 16.
4
4
Name the square number and the square root for each array.
1.
2.
3
3.
2
5
2
3
9, 3
5
25, 5
4, 2
5.
6.
© Harcourt
4.
16, 4
49, 7
36, 6
Find the square number.
7.
55
25
8.
99
81
9.
77
49
10.
11
1
11.
66
36
Reteach
RW87
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