math for ACT
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| IMAGINARY NUMBERS | show 🗑
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| EVEN NUMBER ARE DIVISIBLE BY | show 🗑
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| show | 1 and itself
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| composite number | show 🗑
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| squared means | show 🗑
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| show | numbers are multiplied by themselves twice
2x2x=8 3x3x3=27
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| triangle formulas | show 🗑
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| show | perimeter=4s
area=sxs or s2
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| show | perimeter=2(b+h),or 2b+2h
Area=bh or lw
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| parallelogram formulas | show 🗑
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| show | perimeter = b1 + b2 + s1 + s2
Area = 1/2h(b1 + b2) or h(b1 + b2)
--------
2
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| circle formulas | show 🗑
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| show | Volume = s~s~s=s3
Surface area = s~s~6
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| rectangular prism | show 🗑
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| 1/100 | show 🗑
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| 1/10 | show 🗑
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| show | .2 .20 20%
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| 3/10 | show 🗑
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| show | .4 .40 40%
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| show | .5 .50 50%
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| show | .6 .60 60%
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| show | .7 .70 70%
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| show | .8 .80 80%
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| show | .9 .90 90%
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| show | .25 25%
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| show | .75 75%
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| show | .33 1/3 = 33 1/3%
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| 2/3 = | show 🗑
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| 1/8 = | show 🗑
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| 3/8 = | show 🗑
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| 5/8 = | show 🗑
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| 7/8 = | show 🗑
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| show | .16 2/3 = 16 2/3%
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| 5/6 = | show 🗑
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| 1 = | show 🗑
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| show | 2.00 = 200%
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| 3 1/2 = | show 🗑
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| 3ft = | show 🗑
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| 36 inches = | show 🗑
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| 1760 yards = | show 🗑
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| 5280 ft = | show 🗑
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| 5 1/2 yards = | show 🗑
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| 144 sq in = | show 🗑
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| 16 oz = | show 🗑
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| 2000 lbs = | show 🗑
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| show | 1 cup
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| 2 cups | show 🗑
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| show | 1 quart
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| show | 1 gallon
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| 8 dry quarts | show 🗑
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| show | 1 bushel
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| show | 1 decade
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| 100 yrs | show 🗑
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| show | 1000 meters
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| hectometer (hm) | show 🗑
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| show | 10 meters
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| show | 1 meter
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| 1000 millimeters(mm) | show 🗑
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| 1000 milliliters | show 🗑
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| show | 1 kiloliter (kl)
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| show | quotient divisor dividend ratio parts
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| vertical angles | show 🗑
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| show | next to each other, share a common side and vertex
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| show | 90 degrees
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| show | measures 180 degrees
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| show | divides an angle into two equal angles
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| supplementary angles | show 🗑
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| show | two angles whose total is 90 degrees
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| show | two points
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| parallel lines | show 🗑
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| perpendicular lines | show 🗑
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| polygon | show 🗑
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| regular polygon | show 🗑
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| triangle | show 🗑
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| equilateral | show 🗑
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| show | two sides are equal
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| show | all sides are different
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| in a triangle- | show 🗑
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| show | is equal to the sum of the remote two angles
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| show | a line segment that connects the vertex and the midpoint of the opposite side
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| quadrilateral | show 🗑
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| parallelogram | show 🗑
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| rhombus | show 🗑
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| trapezoid | show 🗑
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| pentagon | show 🗑
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| hexagon | show 🗑
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| radius of a circle | show 🗑
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| show | a line segment that starts and ends on the circle and goes through the center
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| show | a line segment that starts and ends on the circle
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| show | a part of the circle
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| to reduce a fraction | show 🗑
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| show | line them up and multiply straight across
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| show | invert the second and multiply
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| show | divide denominator into numerator
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| show | p.e.m.a.s
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| every fraction implies | show 🗑
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| a decimal is just another way to | show 🗑
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| show | total divided by #of things times average
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| show | do the opposite of addition and subtract 7
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| 3x + 7 = 28 the second step | show 🗑
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| show | =
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| Act English, of product times | show 🗑
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| Act English, what a certain number | show 🗑
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| Act English, what percent | show 🗑
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| show | add
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| one equation and two variables | show 🗑
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| working backwards on math questions | show 🗑
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| show | the sign flips
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| degrees in a circle | show 🗑
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| degrees in a quadrilateral | show 🗑
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| show | 180
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| degrees in a perpendicular angle | show 🗑
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| show | 180
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| in geometry, because the problems are always drawn to scale | show 🗑
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| show | draw one
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| show | If a = b and b = c, then a = c.
1+3=4 and 4=2+2 then 1+3=2+2
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| show | Cross multiplying can be used only when the format is two fractions separated by an equal sign.
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| show | noting a relation in which each element is in relation to itself, as the relation “less than or equal to
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| show | a proposition that is assumed without proof for the sake of studying the consequences that follow from it.
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| show | if a=b then b=a
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| solving equations | show 🗑
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| cross multiplying in algebra | show 🗑
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| Addition/Subtraction Method | show 🗑
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| show | Solve one equation for one variable and substitute that variable into other equations.
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| show | Graph each equation on the same graph. The coordinates of the intersection are the solution.
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| show | add the exponents of the same bases: x4(x3) = x7.
9882.html#ixzz0knPnlwRf
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| to divide monomials | show 🗑
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| show | Combine equations to eliminate one variable. The equations may need to be multiplied by a common multiple first.
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| show | add/subtract like terms only
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| show | multiply each term in one polynomial by each term in the other polynomial.
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| the f.o.i.l method | show 🗑
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| show | an expression that is a sum or difference of two terms, as 3x + 2y and x2 − 4x.
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| To divide a polynomial by a monomial | show 🗑
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| show | make sure both are in descending order, then use long division (divide by first term, multiply, subtract, bring down).
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| distance is | show 🗑
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| interest is | show 🗑
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| work accomplished | show 🗑
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| How many irrational numbers are between 1 and 6 | show 🗑
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| show | 0,2,4,6,8
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| A number is divisible by 3 if the sum of its digits is divisible by 3. | show 🗑
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| show | 316 is divisible by 4 since its last two digits are 16 and 16 is divisible by 4.
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| A number is divisible by 5 if its last digit is either 0 or 5. | show 🗑
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| A number is divisible by 6 if it is divisible by 2 AND it is divisible by 3. | show 🗑
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| A number is divisible by 8 if the number formed by its last three digits is divisible by 8. | show 🗑
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| A number is divisible by 9 if the sum of its digits is divisible by 9. | show 🗑
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| any number raised to the 0 power is | show 🗑
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| any number raised sto the 1st power is itself | show 🗑
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| show | changes the sign of each term in the group
-(a+b)= -a + -b -(a + -b) = -a + b
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| show | # Change the problem to an addition problem.
* Subtracting a negative becomes adding a positive.
* Subtracting a positive becomes adding a negative.
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| show | neg+neg=neg
pos+pos=pos
poa+neg subtract keep the sign of the larger number
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| Rules for multiplying integers: | show 🗑
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| Rules for dividing integers: | show 🗑
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| To cube a number | show 🗑
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| a root is | show 🗑
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| order of operations | show 🗑
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Created by:
carolyn495
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