Post on 01-Sep-2014
description
Group Investigation
Number hunt
Your Mission In your groups, take the
number of cubes (1, 2, 3, 4, 5, etc.) and see if they make squares.
Circle the numbers that make squares!
1- 50
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
Questions of the Day What kind of numbers did
you circle?
What happens if I take the square root of each number compared to the other numbers?
1. Square Root Find the 2 equal factors of a
number
Example: √25 Means: What two equal numbers
when multiplied by each other equal 25
2. Perfect Squares
• A square of a whole number• When you take the square root (√) of a
perfect square the answer is a whole number.
You Try! Find the Positive Square root of a whole
number
a.√36b.√100c.√64
Practice makes perfect
3. The + and the -
√49How many answers are there really?
Every square root has 2 answers. The positive and negative.
√49 = +7 and -7
4. Estimating Square roots
Between what 2 whole numbers would √12 fall between
Think of what 2 perfect squares does 12 falls between!
9 16
12
You Try! Determine between what two numbers
each square root falls betweena.√50
b. √31
c. √105
Check your answers on the calculator
5. Square Root word Problems
As part of her art project, Shannon will need to make a square
covered in glitter. Her tube of glitter covers 13 square inches. What is the greatest side length
Shannon’s square can have?
The answer will be the side length of the square.
List the important information:
• The tube of glitter can cover an area of 13 square inches.
•Square inches=Area
Understand the problem11
22 Make a Plan
The side length of the square is because 13. Because 13 is not a perfect
square, is not a whole number. Estimate
to the nearest whole number.
=
3 4
Because 13 is closer to 16 than to 9, is closer to 4 than to 3.
Does Shannon have enough for a square that has a side length of 4? What is the answer?