Andrew+Journal+Entry+3


 * JOURNAL 3**

Write your own story problem for a friend to solve using addition or subtraction of Mixed numbers.

Mrs. Saunders practiced playing the trumpet for 90 minutes. Then she practiced playing guitar for 75 minutes. For how many __**//hours//**__ did Mrs. Saunders practice playing music?

Step 1: Convert the minutes to hours. 90 minutes = 1 1/2 hours 75 minutes = 1 1/4 hours

Step 2: Change my mixed numbers to improper fractions 1 1/2 = 3/2 1 1/4 = 5/4

Step 3: List the multiples of my denominators to find the LCM 2 - 2, **4**, 6, 8, 10... 4- **4**, 8, 12, 16 ...

Step 4: Make my fill in the blank equations to make a common denominator

3/2 x = ___/4 = 6/4__

__5/4 x__ __=__ _/4 = 5/4

Step 5: Add the numerators of the fractions

6/4 + 5/4 = 11/4

Step 6: Convert to a mixed number

11 divided by 4 = 2 3/4 hours