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What is the first step in evaluating the expression 12 plus 7-2?
12 + 7 - 2 12 + 7 = 19 19 - 2 = 17 or 7 - 2 = 5 5 + 12 = 17
What English mathematician published the first book evaluating pi?
William Shanks
Who first used expression Always leave them Laughing?
George Jessel was the first to use the expression "Always leave them laughing"
What is operators precedence?
Operator precedence (or, "order of operations") comes up in mathematics and computer programming and dictates which operations should be carried out first in evaluating a mathematical expression. The standard precedence used in math, science, and technology is: exponents and roots multiplication and division addition and subtraction Parentheses are also used for clarification or when the above precedence needs to be over-ridden. For example, with an expression line 3 + 2 * 4, you would start with the multiplication of 2 * 4, because multiplication has precedence over addition.
What are grouping symbols?
Grouping symbols are symbols such as parentheses or brackets, that indicate that the operations within them should be done first. When an expression contains more than one pair of grouping symbols, the computations in the innermost grouping should be done first.
