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Math Accuplacer
Terms in this set (46)
divisible by 3
if the sum of the digits is divisible by 3
Ex) 456 ---> 4+5+6=15, 15 is divisible by 3
divisible by 4
if the number named by the last 2 digits is divisible by 4
Ex) 3936 is divisible by 4 because 36 is divisible by 4
divisible by 6
if rules for 2 and 3 check out ---- 1) the number is even & 2) the sum of the digits is divisible by 3
divisible by 8
if the number named by the last three digits is divisible by 8
Ex) 13802120 ---> 120/8 = 15
divisible by 9
if the sum of the digits is divisible by 9
Ex) 3483 ---> 3+4+8+3=18, 18 is divisible by 9
multiplying decimals
count the number of decimal places and add them
Ex) 45.67 x .987 (5 places) = 45.07629 (5 places)
dividing decimals
move the decimal point in the divisor and the dividend the same number of places to get whole numbers
Ex) 23.1 / .004 ----> 23.1 x 1000 / .004 x 1000 ----> 23100/4 ---> 5775
1/2
.5 OR 50%
1/4
.25 OR 25%
3/4
.75 OR 75%
1/5
.2 OR 20%
2/5
.4 OR 40%
3/5
.6 OR 60%
4/5
.8 OR 80%
1/6
.16 OR 16 2/3%
1/3
.33 OR 33 1/3%
2/3
.6 OR 66 2/3%
(x²)(x³)
= x²⁺³
(x³) / (x²)
= x³⁻² OR 1 / x²⁻³
(x²)³
= x²⋅³
(xy)³
= (x³)(y³)
(x/y)³
= (x³) / (y³)
x^⁻³
= 1 / x³
1 / x^-m
= x^m
x⁰
= 1 (x ≠ 0)
x^(p/r)
= x^(power/root)
2²
4
2³
8
2⁴
16
2⁵
32
2⁶
64
3²
9
3³
27
3⁴
81
4²
16
4⁴
256
5²
25
5³
125
6²
36
6³
216
7²
49
8²
64
9²
81
10²
100
11²
121
12²
144
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