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Evaluate each expression | 9?
Evaluate each expression. | 9 | = -9 because Multiplying and Dividing with Positive and Negative Numbers. ... When the signs of the two numbers are the same, the answer will be positive. When the signs of the two numbers are different, the answer will be negative.
Why is math important as a midwife?
Math is crucial for midwives as it aids in accurately monitoring vital signs, calculating dosages for medications, and assessing growth patterns in both mothers and babies. It also helps in interpreting lab results and managing medical records efficiently. Additionally, understanding statistics enables midwives to evaluate risks and outcomes, ensuring informed decision-making in prenatal and postnatal care. Overall, math skills enhance the safety and effectiveness of care provided to families.
How do you know the correct order in which to evaluate algebraic expressions?
You need to memorize some rules. For instance, multiplication and division have a greater priority than addition and subtraction; parentheses are used to change the priority.-----------------------------------Students often learn this mnemonic: "Please Excuse My Dear Aunt Sally" .Do the operations in this order:1st, simplify what's in Parentheses. This includes fraction bars, absolute value signs and radical signs.2nd, evaluate powers ("Exponents") .3rd, do all Multiplications and Divisions in order from left to right.4th, do all Additions and Subtractions in order from left to right.Once you get used to applying "Aunt Sally's Rule", you'll find it's pretty hard to beat!
How do you add numbers with different signs?
You add all the numbers with + signs and subtract all that have minus signs.
What kind of addition signs are there?
There are allot of different signs such as+
