| A | B |
|---|
| 2/3 | .67 or 67% |
| 1/3 | .33 or 33% |
| 1 | 1 or 100% |
| 1/2 | .5 or 50% example 10/20 |
| 1/4 | .25 or 25% example 5/20 |
| 3/4 | .75 or 75% example 15/20 |
| 1% | .01 or 1/100 example 1 cent |
| 10% | .1 or 10/100 example 10 cents |
| 20% | .2 or 20/100 example 20 cents |
| 90% | .90 or 90/100 example 18/20 reduce div by 5 or 20*5 then 18*5 |
| sum means | add |
| difference means | subtract |
| product means | multiply |
| quotient means | divide |
| 2n, what should you do? | multiply n by 2 |
| 1/2n, what should you do? | multiply by 1/2 or divide by 2 |
| 7/8 is about | 1 whole because 7 is near 8 |
| 1/12 is about | a tiny bit because 1 is not near 12 |
| 3/8 is about | a little less than 1/2 because 4/8 would be half |
| 9/16 is about | a little more than 1/2 because 8/16 would be half |
| Round means | stay at 4 or less and go up if 5 or more |
| About or Estimate means | Use easy math facts to solve it! |
| 12/100 = __% | 12 because it is .12, there are 2 zeros so move 2 places |
| .4=__fraction | 2/5 (because 4 tenths 4/10 can be reduced) |
| 3/5 = __decimal | .6 because 3 divided by 5 or equal fractions 5*20 is 100 and 3*20 is 60 |
| 2.03= __ fraction | 2 3/100. Just read it as 2 and 3 hundreths and then write it |
| .15= __fraction | 15/100 or 3/20. Read it as 15 hundreths, then reduce |
| 2 hundreds and 8 tens could also be 1 hundred and ... | 18 tens (280 = 100+180) |
| 1012 = 1000+ __ + 10 + 2 | 0 kind of a trick |
| 475 = 300 + ___ + 5 | 170 just subtract what you have from the starting number |
| 2516 = 2000+ ___ = 10 = 6 | 500 |
| 5 100s and 6 10s= 4 100s + __ | 16 tens or 160. Get the original number and subtract what you have to get what you need. |
| 157 = 100+40+ | 17. Add what you have and subtract from the starting number |
| reduce 6/10 | 3/5 divide the top and bottom by same number. use 2 if even until you can't divide any more |
| reduce 3/15 | 1/5 div top and bottom by same number start with 3 or 5 if odd |
| reduce/divide using 2 if the number ends in | an even number like 0,2,4,6,8 |
| try to reduce/divide using 3 or 5 if the number is | odd |
| reduce/divide by 5 if | the number ends in 0 or 5 |
| reduce/divide by 10 | if the number ends in 10 |
| if 2 rows and 7 more boxes are shaded out of a bunch of boxes it usually means | 27/100 or .27 |
| if 1 box of 100 is shaded and 1 box has 12 shaded it means | 1 12/100 or 1.12 |
| If 6 out of 10 boxes are shaded it means | 3/5 are shaded becuase 6/10 divide top and bottom by 2 |
| if 4 pie slices are shaded out of 16 it means | 1/4 becuase 4/16 can be reduced |
| 2/100 = | .02 read it as 2 hundreths then write it |
| 1/5 = | .2 divide 1.00 by 5 or multiply top and bottom by 20 beucase you need 100 on the bottom |
| What is your spelling grade if you got 16 out of 20? | 16/20 = 20*5 and 16*5 which is 80/100 or 80% |
| 2+1/6= | 2 1/6 |
| 13/6 = _ mixed number | 2 1/6 , divide top by bottom |
| 6 2/3 = __ as improper fraction | 20/3, mult 3*6 then + 2 over the bottom number |
| When you get a math problem what are your 4 options | Add, subtract, multiply or divide |
| order 3/4, 5/6, 3/8 | 3/8,3/4,5/6 Cross mult or 5/6 near 1, 3/8 about 1/2 and 3/4 more than half and less than 1 whole |
| Order 6.2, 6.24,6.19 from big to least | 6.24, 6.2, 6.19. Think money! |
| Order 1/2,1/4,3/4,1 | 1/4, 1/2, 3/4, 1. Think money and quarters or 25 cents and 1/2 is 50 cents 1 is a dollar |
| Order 1/2, 1/3, 3/3, 1/4, 3/4, 2/3 | 1/4, 1/3, 1/2, 2/3, 3/4, 3/3(which is 1). Think money, think decimals 25 cents, 33 cents, 50 cents, 67 cents, 75 cents and 1 dollar |
| Order 3/4, 5/12, 1/2 | 5/12 (less than half), 1/2, 3/4 (more than half) |
| Order 2, 3/4, 1 1/2 | 3/4 (not even a dollar), 1 1/2 (1 buck 50) and 2 (2 dollars) |
| Order 4.5, 4.07, 4.3, 4 | Think money! 4, 4.07, 4.3, 4.5 |
| Order 3/4, 1/10, .5 | Think all money/decimals. 1/10 (.1), .5, 3/4 (.75) |
| Multiply by 10 moves the decimal which way | Right by the number of 0's |
| Divide by 10 moves decimal | Left by number of 0's |
| When you + or - decimals you MUST | Line up the decimals! If there is a blank fill it with a 0 |
| How many places in the answer? | Count the number of places in the problem then same move over that many places in answer. |
| Add 1.3 and 2.09 | 3.39 line up decimals |
| Subtract 5.29 from 6.3 | 1.01 line up decimals |
| Multiply .2 times 8 | 1.6 multiply regular then count over 1 place |
| 4.2 divded by 6 = | .7 Divide and bring the decimal straight up |
| When you + or - fractions you MUST | have the same denominators (same number on the bottom) |
| 3/4 + 1/2 = | 1.25 either think money 75 cents and 50 cents or notice 2 goes into 4 and use 4 as the common denominator |
| 4/5 - 1/2 = | 3/10, 4/5=8/10 - 1/2=5/10 multiply denominators to find common denominator then multiply the tops by the same number you multiply the bottom by |
| 2/3 * 1/2 = | 1/3 because 2*1 = 2 and 3* 2 = 6 so 2/6 divide by 2/2 |
| 3 1/4 * 2 = | 6 1/2 because 3 1/4 = 13/4 and 2 = 2/1 then multiply and turn into mixed number |
| write 4 as a fraction | 4/1 (any number over 1 is the number) |
| 9/9 = | 1 (any number over itself is 1) |
| Write 2 out of 3 as a ratio | 2/3, 2 to 3, 2:3 |
| Write 16 out of 20 as a ratio | 16/20 = 4/5, 4:5, 4 to 5 |
| 3 triangles and 4 squares what is ratio of triangels to total | 3/7, 3 to 7 or 3:7 |
| 3 cats, 5 dogs, ratio of total to dogs | 8:5 put ratio in the order the question asks it |
| Round 6 3/4 to | 7, think .75 or half of the denominator 4 is 2 so over 1/2 rounds up |
| If you round both numbers DOWN your estimate may be | low or LESS than the actual answer |
| If you round both numbers UP the estimate is High and the real answer will be | Less than the estimate |
| Estimate (not round) $15.45 divided by 4 | $4 because $16 div by 4 is easier than $15 div by 4 |
| $40-$20.75 =estimate more or less than $20 in change | Less than $20 |
| Remember metric conversion - move decimal right* or left/ | Kangaroos hopping down my driveway chasing me |
| 1 Garden with 4 Queens each have 2 pear trees with 2 catapillars | 1 Gallon= 4 Quarts = 2 pints = 2 cups |
| How many cups in 2 quarts? | 8 cups. Draw the garden and count |
| 210 cm = ___ m | 2.1 meters divide go left by 2 cent for 100s |
| 2 km = ___ m | 2000 meters multiply go right 3 places for thousands |
| 3 feet = __ inches or 1 ______ | 36 or 1 yard because 3 * 12 (12 inches in a foot) |
| 5280 feet = what | 1 mile |
| put in order ounce, ton, pound | ounce (oz of juice), pound (box of lb sugar), Ton (T cars) |
| A kilomer is about | a mile |
| Meter is about | a giant step or baseball bat |
| A centimeter is about | the width of your pinky finger |
| Acute angle is | less than 90 |
| Obtuse angle is | more than 90 and less than 180 |
| Right angle is | 90 |
| Straight angle(line) and the measure of a triangle = | 180 |
| 32 degrees Fahrenheit | Freezing and = 0 Celsius |
| What are these answers for: 60, 365,24, 52, 12 | sec in hour or minutes in hour, days in year, hours in a day, days in a week, months in a year |
| 2 days = ___ hours | 48 because 24 * 2 |
| What is area for a rectangle with sides of 4 and 6 ft. | 24 square ft. Area = l * w |
| What is Perimeter for a square with side of 3ft | 12 ft P = s +s+s+s or square is 4s |
| A=1/2bh. Triangle with base of 4 and height of 6 ft what is the Area? | 12 sq ft because 6*4 then divide by 2 |
| A= bh are of a parallelogram so if b= 9ft and h=2ft what is the Area | 18sq ft |
| Volume = multiply 3 sides (length, width and height) so what is volume of shape that is 6in, by 3in by 2 in | 36 cubic inches (written with a little 3) multiply any of the numbers in any order don't worry which is length, width or height |
| Parallelogram | quad with parallel sides |
| Rhombus | diamond all side = and parallel |
| Trapezoid | quad with 1 set of parallel sides |
| Pentagon | 5 sides could be a house |
| Hexagon | 6 sides |
| Octagon | 8 sides |
| Decagon | 10 sides |
| Polygon | closed flat shape with straight sides |
| Vertices | where line segments come together to form an angle |
| Congruent | same shape and size, equal |
| Symmetry | fold over and it covers it exactly |
| Odered pairs go first __ and then ___ | go over and then up. The baby crawls and then it walks |
| Clockwise goes to the | right like the numbers on the clock go 1, 2, 3 |
| Counterclockwise turns to the | left backwards on the clock 11, 10, 9 |
| rotate means | turn could be 90 which is a quarter turn or 180 which is a half turn |
| translate means | slide...it moves over or up or down but looks the same. Count over and up or down. |
| reflect means | flip |
| Rectangualr prism means | a box (rectangle) think shoe box or rubric's cube |
| cone looks like | an upside down ice cream cone the bottom is the base |
| A cylinder is like | a can of food, the top and bottom are called bases |
| Pyramids look like | 4 sides on the bottom and point on the top |
| A triangular prism looks like | triangles on the ends with flat sides |
| What has faces (sides)vertices (angles), edges (where the sides fold together) | 3 D shapes |
| A Sphere looks like | a globe |
| What is the mean of 20, 10, 30? | 20, Add the numbers and divide by the number of number |
| What is the median of 10, 100, 20, 90,40? | 40, put them in order and pick the middle number |
| What is the mode of 10, 20, 30 , 20, 30 , 40 , 40, 40? | 40, it is repeated MOST often |
| For Stem and Leaf if the stem is 6 and the leaves are 2,3,4 what numbers do they represent? | 62, 63, 64 put the stem and the leaf together |
| Bar graph - if the tallest bar is for soccer and it is haf way between 200 and 300 it shows how many kids like soccer? | 250 kids |
| Pie chart/circle graph - if half the chart is colored for kids who like vanilla ice cream and there are 100 kids how many eat vanilla? | 50 or half of the kids |
| Pictograph - if a smile mean 4 kids and you see 2 smiles how many kids are there? | 8 because 2 smiles * 4 kids = 8 |
| Line graph - Feb had the most snow and June and July had none, which month is highest? | February |
| Probability of picking red when you have 3 green, 2 red and 5 blue | 2/10 or 1/5 which is 20%...what you want over total of what you have |
| Tree diagram shows what? | shows options Draw it, guess and move on |
| 10 kids, 5 like vanilla, 3 like choc, 2 like both what goes in the middle of the Venn diagram? | 2 things in common and the inside plus the outside of the circle = the total for that circle consider guess and move on |
| Patterns 2, 4, 6, __,__,__ | 8, 10, 12 see if you can add, subtract or multiply to get to the next number. Write down how you get from the first to the second number and keep going. |
| 150 + y = 380 | 230 just subtract 380-150 or try all the answers they give you and see if you get the correct answer when you DO the math |
| 8x= 180 | 10, divide or try all the answers they give you and see what works |
| n/4 = 12 | 48 Multiply or try all the ones they give you and see what works! |
| y - 3 = 50 | 53 Add or try all the answers they give you and see what works! |
| When you have an equation (math problem) with a variable (letter) you should | do the opposite operation or try all the answers they give you and see which one works! |
| What math expression would you use to calcualte how many days in 2 years? | 365 * 2 |
| What math expression for 3 pans of cookies with 12 each | 3*12 |
| What is the unit cost of 1 apple if 12 apples for $3.60 | .30 or 30 cents |
| What are the 4 math operations? | add, subtract, multiply or divide? |
| What triangle has 3 equal sides | Equalateral |
| Triangle has angle of 90 and 45 what is the other angle? | 45 because together they =180 |
| How much time elapsed between 9:45 and 11:15? | 1 and 1/2 hours |
