Math+Test+Unit+4+-+Adding+&+Subtracting+Fractions

__Benchmark__  (Lesson 4-1)
A whole number or fraction that is easy to use when you estimate. //Example//:You can use the benchmarks 0,1/2 or 1 to estimate sums and differences. Add the 1/2,1 or 0 to the other to give the answer. 1234810675corrections by 1234819435

**__Elapsed Time__ (Lesson 4-7) **
The time between two events. Ex. 1:52PM-5:49AM=15hrs57min 1234908099

How would you find the difference (elapsed time) from 8:12am -6:45pm? (Lesson 4-7) Make sure you use Military time to find the amount of time between A.M and P.M.1234824701 Also make sure that when you borrow a hour DO NOT ONLY ADD ONE MINUTE MAKE SURE YOU ADD 60 MINUTES!
 * Change 6:45 pm to military time (18:45)
 * Subtract 18:45 and 8:12.
 * That gives you 10 hrs. 33 min.

Also make sure that when you are changing from A.M. to P.M. you add 12 hours to the later time. 1234840484 Make sure you subtract (after you add 12 hrs) A.M. from P.M.1234914026

**__To Add and Subtract Fractions__** You have to line them up the vertical way and then find a common denomator. Then add the numerators. From there you will add your whole numbers and then you have your answers. BUT ALWAYS REDUCE to SIMPLEST FORM if you can. Corrections by 1234829622

Make sure when you add and subtract fractions you find the same denominator.1234828931 Proofreading corrections by 1234829698

__**Adding Fractions With Like Denominators**__ **(Lesson 4-2)** Take the numerators and add them. Keep the denominators the same. Example: 5/16+9/16=14/16 Make sure you reduce! 7/8 1234820548

To subtract a fraction like 2 and 1/3-2/3, you would have to borrow from the two and make it one the you add 3/3 to 1/3 and then you subtract and you get 1 and 2/3.

find a common denominator to add or subtract fractions. c(-: (User:Monkeyboy2009)

Make sure you don't silly mistakes and leave a fraction improper 1234921435~

Read the complete directions carefully before solving the problem. 1234843117