817PaolaB

__**central tendency of measurements**__

Mean-The sum of numbers in a set of data divided by the number of pieces of data (average). wAy tO dO iT... FIRST STEP: arrange your data set to smaller to bigger example: set of data:(unarrange) 8,5,1,6,7,9,8 set of data(arrange) 1,5,6,7,8,8,9 SECOND STEP: add the set of data example: 1+5+6+7+8+8+9=44 THIRD STEP: after you add it, divide it on how many your set of data is example: 44/7=6.2 the answer would be the average __6.2__

Median-The middle number of the set of data. WaY tO dO it... FIRST STEP: partner up your arrange set of data from first to last. (set of data the same as the example in the mean) example: 1 to 9,5 to 8 and 6 to 8 SECOND STEP: since 7 is the one without a partner, __7__ is your middle number/median.

Mode-The most common number. wAY tO dO iT.. FIRST STEP: the number that appear many times in a set of data. example: set of data: 1,5,6,7,__8,8,__9 since 8 appears the most it is your mode.

QUESTIONS: find the mean,median and mode from the set of data below.(remember to arrange the numbers.!)

set of data: 7,9,12,17,5,9,3 answer: mean 3+5+7+9+9+12+17=62/7=8.86 median 3 to 17, 5 to 12, 7 to 9 9 mode 9 8-17pbanswer

__Square Root__

Square Root- a number that multiplies by itself. Perfect Square-when you multiply it the answer is exact number.no decimals.

ways to do it...

question:what is the square root of 38?

FIRST STEP: find what's the in between of 38.(use the chart) example: 6x6=36, 6.?x6.?=38, 7x7=49 SECOND STEP: subtract 49 and 36 example: 49-36= 13 13 would be the denominator. THIRD STEP: subtract 49 and 36. 38-36=2 2 would be your numerator FOURTH STEP: since 6 is the first number before 38, that would be your whole number FIFTH STEP: the answer would be 6 2/13.

QUESTION: what is the square root of 52? 7 3/15 what is the square root of 45? 6 9/13 817pbanswer

__Percent__

Percent-part of a whole. WayS tO Do It.... FIRST STEP: divide the price to 100 example: $30/100=0.3 SECOND STEP multiply the answer in step one to the percent example: 0.3x25%=$7.5 The answer in third step is the discount price to the original price. THIRD STEP: subtract the discount price to the original price. $30 - $7.5=$22.5 the new price of the discount item is $22.50 Percent discount Question: is taking the 15% off a given item and then an additional 10% off the reduce price the same as taking 25% off the original price?why or why not? no,because you can save money by buying the 25% off of the original price 8-17pbanswer

__Ratio proportion__ answer with a ratio table, cross multiplication,and fraction. Problem:Marvin can bike 2km for 1 hours if he bike for 6hours how many km did he bike?. hours = 1 6 - =--- km 2 12 7pbanswer


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 * Question for parent to do || 2 || /2 || /2 || /2 || /2 ||
 * Answer with explanation || /2 || /2 || /2 || /2 || /2 ||
 * Parent Notes explaining topic || /2 || /2 || /2 || /2 || /2 ||
 * Extra work to further explain topic, bubbleshare, pictures etc. || /3 || /3 || /3 || /3 || /3 ||
 * Extra links to math blog sites || **/5** ||  ||   || **Total** || **47** ||