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Rounding Decimals

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Rounding Decimals Round to Whole Number:
Example: Round to whole number: a. 3.7658 b. 6.2413 If the first decimal number is ≥ 5, round off by adding 1 to the whole number and drop all the numbers after the decimal point. If the first decimal place is ≤ 4, leave the whole number and drop all the numbers after the decimal point. 3.7658 = 4 6.2413 = 6 Round to 1st decimal: Example: Round to whole number: a. 3.7658 b. 6.2413
If the 2nd decimal number is ≥ 5, round off by adding 1 to the 1st decimal number and drop all the number after the 1st decimal number. If the second decimal number is ≤ 4, …show more content…

Formula Method: Identify the following on the problem: D, H, Q and A Fill in the formula Cancel the units Calculate

D/H x Q = X

D = desired dose
H = dose on hand
Q = dosage unit
A = unknown

Ratio-Proportion Method

Convert:
Units you are converting to (A) Number you need to convert (B) A/B or A:B

Unknown (C) Number that you need to convert (D)

Set up the proportion: A/B = C/D or A:B = C:D

Cancel Units

Cross-multiply to solve for the unknown

(Dosage on Hand)/(Amount on Hand) x (Desired Dosage)/((X) Amount desired)

C. Dimensional Analysis

Determine the unit of measure for the: amount to give ratio (left side of the equation)

Supply dosage ratio (right side of the equation)
(unit of numerator should match the unit numerator of amount to give ratio)

Set-up Conversion factor ratio (units of measure for the answer on top and the units you are converting from on the bottom) Cancel units on the right side of the equation, leaving unit of amount to give.

Amount to Give
Ratio
= Supply
Dosage
Ratio
X Conversion
Factor
Ratio
X Ordered
Dosage
Ratio

IV Flow Rate

mL/h = (Total mL)/(Total

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