Word Problems and Mathematical Operations

This video tutorial covers lesson 5.5a on applying operations with rational numbers in word problems. It emphasizes the importance of clue words in determining the necessary mathematical operations and outlines a four-step process for solving word problems: analyzing information, formulating a plan, solving the expression, and evaluating the solution. The video also distinguishes between expressions and equations, reviews the order of operations (PEMDAS), and provides examples of solving word problems involving costs and charges. The lesson concludes with a preview of converting fractions and decimals in word problems.

What is the first step in solving a word problem according to the lesson?

• Formulate a plan

• Analyze the given information

• Solve the expression

• Justify and evaluate

Which of the following is NOT a clue word for addition?

• Sum

• Difference

• Total

• In all

What does PEMDAS stand for?

• Parentheses, Exponents, Multiplication, Division, Addition, Subtraction

• Parentheses, Exponents, Division, Multiplication, Addition, Subtraction

• Parentheses, Exponents, Multiplication, Addition, Division, Subtraction

• Parentheses, Exponents, Addition, Multiplication, Division, Subtraction

In the expression 5.4 + 3.2, what is the first operation to perform?

• Multiplication

• Subtraction

• Addition

• Division

How much did Bob spend on grapes if he bought 2.25 pounds of green grapes and 3.75 pounds of red grapes at $2.19 per pound?

• $15.00

• $14.00

• $12.50

• $13.14

Who charges more per lawn, Bob or Dave?

• Bob

• Dave

• They charge the same

• Not enough information

What should you do if a word problem contains both fractions and decimals?

• Ignore the decimals

• Convert all to decimals

• Convert all to fractions

• Use both as they are