Writing Mathematical Expressions

In this lesson, students learn to write mathematical expressions where letters represent numbers. The teacher explains various expressions, including sums, products, quotients, and exponents, using examples. Key concepts like using parentheses for quantities and handling 'less than' expressions are covered. Students are encouraged to practice and bring questions to class.

What does the term 'twice' imply when writing expressions?

• Divide by two

• Subtract two

• Multiply by two

• Add two

How would you express 'the sum of twice B and five' using variables?

• B - 5

• 2 + 5B

• B + 5

• 2B + 5

What does 'raised to the fifth power' mean in mathematical expressions?

• Multiply by five

• Divide by five

• Add five

• Exponent of five

How would you write 'a raised to the fifth power increased by the product of five and C'?

• a^5 - 5C

• a^5 / 5C

• a^5 * 5C

• a^5 + 5C

What does the term 'quantity of' indicate in expressions?

• Use brackets

• Use a colon

• Use a semicolon

• Use parentheses

How would you express 'the quantity of a plus B divided by four'?

• (a + B) / 4

• a + (B / 4)

• a + B / 4

• (a / B) + 4

What does 'less than' imply when writing expressions?

• Multiply the terms

• Divide the terms

• Add the terms

• Switch the order of terms

How would you write '10 less than the product of 15 and C'?

• 15C - 10

• 10 - 15C

• 15 - 10C

• 10C - 15

What is the correct expression for '150 decreased by the quantity of six plus B'?

• (150 - 6) + B

• 150 - 6 + B

• 150 + (6 - B)

• 150 - (6 + B)

How would you express 'the sum of twice C and ten'?

• C - 10

• 2C + 10

• 2 + C + 10

• C + 10