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Math
Homework for the week of January 5-9, 2009
Unit 5, pg. 3 due Tuesday, January 6th.
Unit 5, pg. 4 due Wednesday, January 7th.
Right Triangle: one angle measures 90° (right angle)
Acute Triangle: all angles are less than 90°
Obtuse Triangle: one angle is more than 90°
Isosceles Triangle: two sides are equal in length
Scalene Triangle: all sides are different in length
Equilateral Triangle: all sides are equal in length
Fraction: number that shows part of something; any part of a whole
Decimal: point between a whole number and a fraction
Percent: number out of 100
Numerator: top number of a fraction showing parts of a whole
Denominator: bottom number of a fraction showing the whole amount
Equivalent: equal
Rectangular Prism: a solid, 3-D shape with 2 identical, rectangular bases
Dimension: refers to length, width, and height
Example: If the dimensions of a rectangular prism is 3 x 4 x 2,
the volume would be 24 cubic units
the volume would be 24 cubic units
Divisor: the number used to divide another number
Dividend: the number to be divided
Quotient: the number other than the remainder that is the result of dividing
Remainder: the number less than the divisor that remains after the division is complete
Array: a set of objects arranged in rows and columns
Multiples: the product of a given whole number and any other whole number
Example: Find the first 5 multiples of 3
3: 3, 6, 9, 12, 15
3: 3, 6, 9, 12, 15
Product: the number that is the result of multiplying two or more factors
Example: 5 x 4=20
20 is the product
20 is the product
Factors: numbers that are multiplied to get a product
Example: 5 x 4=20
5 and 4 are the factors
5 and 4 are the factors
Review
Click here to see an example of this method.
MULTIPLICATION STRATEGIES
Solve 35 x 28=
35 x 20=700
30 x 8 =240
5 x 8 = + 40
980
Changing one number to make an easier problem
35 x 30 = 1,050
35 x 2 = 70
1,050 - 70=980
Creating an array
HOW TO FIND FACTORS OF A NUMBER?
When finding factors of a given number, I have taught the class to begin with 1 and end with the number for which they are finding the factor. They are then to work inward finding the pairs of numbers that when multiplied together equals the given number.
Example: Find the factors of 36
36: 1, 36
1, 2, 18, 36
1, 2, 3, 12, 18, 36
1, 2, 3, 4, 9, 12, 18, 36
1, 2, 3, 4, 6, 9, 12, 18, 36
1, 2, 18, 36
1, 2, 3, 12, 18, 36
1, 2, 3, 4, 9, 12, 18, 36
1, 2, 3, 4, 6, 9, 12, 18, 36