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Brush up on Math BCTC Nursing Student Resource Center Renee Felts, RN

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Decimals: Which is largest? a. 0.5 b. 0.15 c. 0.05 Which is smallest? a. 2.66 b. 2.36 c. 2.87

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Addition of decimals: Add: 5.33 + 22.7 +.08 =

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Addition of decimals: 5.33 22.7 +0.08 28.11 *Make sure the decimal points line up.

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Multiplying Decimals: When multiplying decimals, be sure the decimal is placed in the correct position in the answer (product). 1.2 x 3.2 = ? How many decimal places will be in the answer?

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MULTIPLYING DECIMALS: Try this: 1.35 x 0.65 = How many decimal places in this answer? How many places to the right of all decimals combined?

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Multiplication by Decimal Movement Move the decimal to the right the same number of places as zeros in the number by which you are multiplying* Example: 0.5532 x *1000 = 553.2 or 0.003 x *10,000 = 30 (add zeros to the right of the number)

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Dividing Decimals: Quotient Divisor Dividend Divide: 175 by 5 =

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Division by whole number: Now... Divide 17.5 by 5 17.5/ 5 = How is your answer different?

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Division by Decimal Movement: When dividing by 10, 100, 1000, 10,000 etc., move the decimal to the left, the same number of places as there are zeros in the divisor. Example: 0.46 divided by 10 = 0.046 520.20 divided by 1000 = 0.5202 10 Divided by 1000 = 0.01

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Dividing Decimals by Decimals: Suppose you had to divide 5.5 by 0.35? What is the first step?

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Rounding Off Decimals Rounding to the nearest tenth (carry the division to the hundredths place, if the number in the hundredths place is 5 or greater, add one to the tenths place) ◦ Ex: 3.15 to the nearest tenth = 3.2 ◦ Ex: 5.516 to the nearest tenth = 5.5 ◦ Ex: 7.582 to the nearest tenth = 7.6

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Rounding Off Decimals Rounding to the nearest Hundredths (carry the division to the thousandths place, if the number in the thousandths place is 5 or greater, add one to the hundredths place) Ex: answer = 0.174 (drop the 4 = 0.17) Ex: answer = 0.175 (add 1 to the hundredths place = 0.18)

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DOL disclaimer This workforce solution was funded by a grant awarded under the President’s Community-Based Job Training Grants as implemented by the U.S. Department of Labor’s Employment and Training Administration. The solution was created by the grantee and does not necessarily reflect the official position of the U.S. Department of Labor. The Department of Labor makes no guarantees, warranties, or assurances of any kind, express or implied, with respect to such information, including any information on linked sites and including, but not limited to, accuracy of the information or its completeness, timeliness, usefulness, adequacy, continued availability, or ownership. This solution is copyrighted by the institution that created it. Internal use by an organization and/or personal use by an individual for non- commercial purposes is permissible. All other uses require the prior authorization of the copyright owner.

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