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# Brain Dump

1.234 The one is in the: ones place or whole number place
1.234 The two is in the: tenths place
1.234 The three is in the: hundredths place
1.234 The four is in the: thousandths place
Even numbers end in: 0 , 2, 4, 6, 8
Odd numbers end in: 1, 3, 5, 7, 9
Even numbers are: divisible by 2
Odd numbers are: not divisible by 2
Prime numbers: on a calculator, divide them by 2, 3, 5, and 7 get all decimal answers
Composite numbers: on a calculator, divide them by 2, 3, 5, and 7 get at lease one whole number
The angles of a triangle always add up to 180
1/2 0.5
1/4 0.25
3/4 0.75
1/5 0.2
2/5 0.4
3/5 0.6
4/5 0.8
If you don't know what a fraction is as a decimal divide the numerator by the demoninator
1/8 0.125
3/8 0.375
5/8 0.625
7/8 0.875
1/9 0.111
2/9 0.222
3/9 0.333
1/10 0.1
2/10 0.2
3/10 0.3
1/11 0.0909
2/11 0.1818
3/11 0.2727
4/11 0.3636
Area of a rectangle L x W
Area of a square L x L
Area of a triangle B x H รท 2
Perimeter of a rectangle (2 x L) + (2 x W)
Volume L x W x H
Angles < 90 acute
Angle > 90 obtuse
Angles = 90 right
Angle = 180 straight
Mean, median, mode Measures of CENTER
Mean Average & Fair Share
Mean add all numbers and divide
Mode most often
Median middle number
Milli- 1/100 Will always be the FLY
Kilo 1,000 Will always be the HORSE
Centi- 1/100 Will always be the FLY
2 x R = 4 R is the variable
5 - ? = 3 ? is the variable
Triangle: all side same length equilateral
Triangle: 2 sides the same length isosceles
Triangle: no sides the same length scalene
fly to horse divide of course
horse to fly multiply
translation slide
rotation turn
reflection flip
Created by: MrLittle5
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