# numbers and formulas.pdf - Term Definition Examples Whole...

• 13

This preview shows page 1 - 4 out of 13 pages.

The preview shows page 2 - 4 out of 13 pages.
TermDefinitionExamplesWholenumbersPositive numbers that aren'tfractions.1, 2, 3, 4, 5, 6, 7, 8, 9, 10, and so onIntegersAll whole numbers plus zeroand negative numbers.…-5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5…RationalnumbersIntegers plus fractions anddecimals that end or repeat.-1, -0.5, 0, 0.5, 1, 1.25, 1.333333…, 1.5, 2, 21/2IrrationalnumbersAll numbers that can beexpressed as decimals thatnever repeat and neverterminate.Pi (3.14159265…) is the most well-knownirrational number.RealnumbersThe set of all numbers,including rational and irrationalnumbers.Essentially all the numbers you can think of.PrimenumbersA positive integer that hasexactly two positive factors, 1and itself.The list of prime numbers in the set ofnumbers from 1-60 are 2, 3, 5, 7, 11, 13, 17,19, 23, 29, 31, 37, 41, 43, 47, 53, 59.CompositenumbersA positive integer that has morethan two factors.The list of composite numbers in the set ofnumbers from 2-60 are all numbers exceptthe prime numbers listed above.RuleDefinitionExamplesMultiplicationRule #1The product of any number and zero is alwayszero.3 × 0 = 0 or
1,894 × 0 = 0MultiplicationRule #2If the numbers being multiplied have the samesign, the answer is always positive.5 × 6 = 30 or-5 × -6 = 30MultiplicationRule #3If the numbers have different signs, then theanswer is always negative.6 × -5 = -30 or2 × -12 = -24MultiplicationRule #4When you're multiplying an odd number ofnegative numbers, the answer will be negative.-3 × -5 × -1 =-15MultiplicationRule #5When you're multiplying an even number ofnegative numbers, the product is positivebecause all of the negative numbers are pairedup.-1 × -4 × -6 ×-2 = 48To spot a multiplication problem in a word problem, look for the wordof.
Each carton contains 15 apples. John had three cartonsofapples. How many applesdid he have?Here,oftells you to multiply the number of cartons by the number of apples in eachcarton.

Course Hero member to access this document

Course Hero member to access this document

End of preview. Want to read all 13 pages?

Course Hero member to access this document

Term
Fall
Professor
Staff
Tags
Elementary arithmetic
• • • 