Estimating squares and cubes.notebook
April 20, 2016
Estimating Square and Cube Roots
Do Now: 1. Evaluate the following:
400
3 2744
+
961
3
­74088
Estimating squares and cubes.notebook
April 20, 2016
Estimating squares and cubes.notebook
Perfect square­ A number made by squaring a whole number. 1
4
9
16
25
36
49
64
81
100
121
144
April 20, 2016
Perfect cube­ A number made by cubing a whole number.
1
8
27
64
125
216
343
512
729
1000
1331
1728
Today we will be doing two things: Estimating and Rounding. We will be using NON­perfect squares and cubes
Estimating ­ determining your answer PRIOR to calculating your solution
Rounding ­ Replacing your answer closer to another number with less decimal places.
Estimating happens first and rounding happens last!
Estimating squares and cubes.notebook
April 20, 2016
No Calculator.
Find two integers that the square root is in between.
40
29
_ 75
_ 133
1
4
9
16
25
36
49
64
81
100
121
144
No Calculator.
Find two integers that the cube root is in between.
3 29
3
­619
3 431
3
758
1
8
27
64
125
216
343
512
729
1000
1331
1728
Estimating squares and cubes.notebook
April 20, 2016
Use Calculator to find each value to the nearest tenth
­
3
61
+ 152
77
3
5120
349
3
­863
Find each value to the nearest hundredth
91.7
33
Try a few!!!
Find two integers that the root is in between.
No Calculator.
3
3
_
30
81
125
97
Use Calculator to find each value to the nearest tenth.
3
513
+ 214
Estimating squares and cubes.notebook
April 20, 2016
Olivia is building a birdhouse. The bottom part is a cube
1
with a volume of cubic foot. What is the length of each
8
edge of the cube in feet?
Estimating squares and cubes.notebook
April 20, 2016
A cube shaped toy is made of 125 small cubes. How many
small cubes are on each edge of this toy?
You want to sew a fringe on a square tablecloth with an area of 500 square inches. Calculate the length of each side of the tablecloth and the length of fringe you will need to the nearest tenth of an inch.