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A prescription calls for a first dose of 2 1/4 grains followed three hours later by a dose of 1 1/2 grain. The second dose is how many grains less than the first dose? 8. The flow rate of oxygen, through a mask, was measured at 5 L/min (liters per minute). As the patient’s condition changed the flow rate was adjusted. Give the rate of flow of oxygen. Change Flow by flow a. decrease the 5 L/min the b. decrease answer C. increased the answer the d. increased found in a112 by Llmin L/min found in b by 113 Llmin Llmin answer found in c by 112 L/min L/min answer e.

1. How many thirds are there in 2? 2. 2 + -1= ? 3 3. How many fourthsarethere 4 + -1= ? 5 in 4? 4. How many eighthsarethere 8. in 2? 10 in 3? 6. 3 + -1= ? 8 7. How many tenthsarethere 2 + - 1= ? 1 4+-=? 4 5. How many fifthsare there in 4? How many sixthsarethere in l ? I + -1= ? 6 a. 1 How many -s are there in I? b. 2 How many -s are there in l ? a. 1 How many -s are there in I? 8 b. 2 How many "s are there in 1? c. How many -s are there in I? How 1 many -s are there in 3? 3 b. 2 How many --s are there in 3?

8 8 " 4 1 21. - - 3 3 Perform the operationin parenthesis first. 22. (; - ); 4 2 1 6 -- 23. 4 1 (67 - 9) -9 5 20 - 24. (z +) - 2 16 -- 25. What is the purpose of the parenthesis in problems 22-24? 26. Is the following statement true or false? Explain. Hint: Perform the operation in parenthesis first. COMMON DENOMINATORS When fractions have unlike denominators the common denominator must be found. Least common multiplesand prime factorization canbe used to find the common denominator. DEFINITIONS The least common multiple(LCM) of two or more numbers isthe smallest numberthat has eachof the two numbers as a factor.

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101 short cuts in math anyone can do by Rockmaker G.

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