Counting Numbers - 1, 2, 3, 4, 5, 6, ......
Sequence - Ordered list of numbers.
Digits - Counting Numbers and zero. 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
Even Numbers - 0, 2, 4, 6, 8,.... Numbers that can be divided evenly by 2.
Odd Numbers - 1, 3, 5, 7, 9,... When divided by 2, there will be one remaining.
Addends - Numbers that are added. EX. 2 ----addend
+ 3 ----addend
Sum - Answer to an addition problem. 5 ----sum
Algorithm - Procedure for finding the answer.
Ordinal Numbers - Numbers used to name position or order.
Ex. 1st, 2nd, 3rd, 4th, 5th, 6th,.........
Difference - The answer to a subtraction problem.
Ex. 9 - 4 = 5 ----difference
Inverse Operations - Operations that "undo" one another.
Ex. + undoes -
x undoes ÷
Equation - A number sentence with an equal sign. Ex. 11 + 25 = 36
Stories about combining have an addition pattern.
Geometry - The study of shapes.
Point . Line ‹―› Line Segment ― Ray ―›
Types of Lines:
horizontal ‹―› vertical | oblique /
Factors - Numbers that are multiplied. Ex. 4 ----factor
Product - Answer to a multiplication problem. x 6 ----factor
Multiples - Product of a number & another number. 24 ----product
Ex. 24 is the product of 1 x 24, 2 x 12, and 3 x 8, so 24 is a multiple of all those
numbers.
Prime Numbers - Numbers with exactly 2 factors - 1 and itself.
Ex. 2, 3, 5, 7, 11, 13, 17, 19, 23, 29,...
Composite Numbers - Numbers with more than 2 factors.
Ex. 4, 6, 8, 9, 10, 12, 14, 15, 16,.....
Division Algorithm - Procedure for solving division problems.
We use the acronym:
Does Divide
McDonalds Multiply
Sell Subtract
Cheese Check to see that the difference is smaller than the divisor
Burgers Bring Down & start over
Steps to Rounding Whole Numbers & Decimals:
1) Find the place to which you are rounding.
2) Look at the digit to the right of that place.
3) If the digit to the right is less than 5, the place you are rounding stays the same.
If the digit to the right is 5 or more, add 1 to the place you are rounding.
4) The number(s) after the rounded number becomes a zero. With decimals, do not write
the zero(s).
Ex. 46 rounded to the nearest ten = 50
375 rounded to the nearest hundred = 400
121 rounded to the nearest ten = 120
| 3 Types of Angles: | |
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1) Acute angle
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| 2)
Right angle
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3) Obtuse angle
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| Classifying Triangles by their Angles: | |
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1) Acute Triangle - All angles are acute angles.
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| 2)
Right Triangle - Has a right angle.
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3) Obtuse Triangle - Has one
obtuse angle.
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| Classifying Triangle by the length of their sides: | |
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Equilateral Triangle - All sides are the same length.
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| 2)
Isosceles Triangle - Two sides have the same length.
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| 3)
Scalene Triangle - All sides are of different lengths.
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Mixed
Number - A whole number and a fraction written together.
Ex. - 1⅜
Percent - Out of 100;
for each 100.
Ex. - $0.45 is 45% of $1.00
Perimeter
- The distance around a polygon. Hint: The
rim
is the outside edge. 
P = 2(5 in. + 2 in.)
2 in.
P = 2(7 in.)
P = 14 in.
Regular Polygon - A polygon whose sides are equal in length and whose angles are equal in measure.
These are all regular
polygons.
Circumference - The distance around a circle.
Radius - The distance from the center of the circle to a point on the circle.
Diameter - The distance from across a circle through the center.
Ex.
Probability - The likelihood of an event or series of events will happen. Probability is expressed as a fraction.
| Probability Of An Event | |||
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Equivalent
- Equal in value.
Equ i valent
Equal in
value Ex. 1 = 2
2 4
mean - (Average) Add the given numbers, then divide by the number of addends.
median - The middle number in a group of ordered numbers.
mode - The number that occurs most often in a given set of numbers.
range - The difference between the greatest and the least number in a given set of numbers.
Transformations:
translation - (slide)
reflection - (flip)
rotation - (turn around)
