TSIA2 Math 53 Questions And Answers Set 02
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Terms in this set
53
How to -/+ unlike fractions
- find the common denominator and multiply.
1/2(4)+3/8-> 4/8+3/8= 7/8
- b add the numerators and reduce.
- Just divide both n&d by the number
1/2(4)+3/8-> 4/8+3/8= 7/8
- b add the numerators and reduce.
- Just divide both n&d by the number
How to find the common denominator
The common denominator is the lcm of the given fractions.
- 3/4,1/5
4,8,12,16,20
1,2,3,4,5
3/4(5),1/5(4)
=15/20,4/20
Multiply both fractions by their LCM
- 3/4,1/5
4,8,12,16,20
1,2,3,4,5
3/4(5),1/5(4)
=15/20,4/20
Multiply both fractions by their LCM
The square root of a number is always...
positive
Find Dimensions means to...
Find the length and width
Ordered pair
Any pair of numbers for which the order is important. (x,y)
Divisibility Rules
2- When the number is even
3- the sum of the digits is divisible by 3
5- limit digit is 0 or 5
9- sum is divisible by 9
10- ends in 0
6- odd numbers and 2
3- the sum of the digits is divisible by 3
5- limit digit is 0 or 5
9- sum is divisible by 9
10- ends in 0
6- odd numbers and 2
Prime factorization
The numbers multiplied together to get the original to get the original number.
Reducing Fractions
Divide the numerator and denominator by their gcm.
30/75
30,15
1,2
gcf=15
15/5
The gcf of both terms is 1.
30/75
30,15
1,2
gcf=15
15/5
The gcf of both terms is 1.
Comparing Proper Fractions
1)Find multiples to make common denominators
5/8,7/12
8,16,24
1,2,3
12,24
2) Multiply fractions by lcm to get common denominators
15/24>14/24
5/8,7/12
8,16,24
1,2,3
12,24
2) Multiply fractions by lcm to get common denominators
15/24>14/24
Mixed Number to an Improper Fraction
Multiply Denominator by whole number
Add result to numerator.
Add result to numerator.