Counting on- 7+4 , start at 7 and count 8,9,10,11Set Model- Used base ten blocks, combine if possibleNumber Line- distance or length , visual aid
Properties and Techiques
Whole Numbers
18 and 30 {1,2,3,6,9,18}{1,2,3,6,10,15,30}Greatest Common Divisor is 68 and 128,16,24,32,40,48...12,24,36,48...Least Common Multiple is 24
GCD= Greatest common # that divides into the number
LCM= Least common # for A & B numbers
b | a - b is a factor or divisor of A and A is a multiple of ba=bq - 2|12... 2q=12.. 9=6 No
Notation
Divisibility Tests
8+8+8=248 times 3 = 24
Properties and techniques
Whole Numbers
Babylonian - triangles and greater than signEgyptian- tally marks Mayan- horizontal dots and linesGreek- lettersRoman- Letters, used to symbolize ageHindu- numbers Arabic-numbersHindu- Arabic- US form of numbering
Different Ways To Count