Tag Archives: Signed Numbers

SAT/ACT problem of the week, January 05, 2017 solution

Hint for process of elimination: The most important thing to recognize is that this problem can EASILY be solved by punching the numbers into the calculator. The second thing to know is the three major easy arithmetic facts and tips that students forget all the time but they shouldn’t live life without knowing:

  • Know that the word “product” implies multiplication.
  • Do not mix up the concepts of multiplication and addition.
  • Know how to multiply negative numbers, including knowing that the product of two negative numbers is positive.

Read on for a full solution.

Continue reading

SAT/ACT problem of the week, January 05, 2017

What is the product of -2 and -3? (Seriously, this is a real ACT question.)

  1. -6 (check answer)
  2. -5 (check answer)
  3. -1 (check answer)
  4. 5 (check answer)
  5. 6 (check answer)

Solutions, hints, and questions are welcomed. A full solution will be posted on October 9th. If you would like to learn how to enter math formulas into this blog, visit the WordPress LaTeX tutorial page.

SAT problem of the week, January 05, 2015 solution

Hint for process of elimination: The most important thing to recognize is that this problem can EASILY be solved by punching the numbers into the calculator. The second thing to know is the three major easy arithmetic facts and tips that students forget all the time but they shouldn’t live life without knowing:

  • Know that the word “product” implies multiplication.
  • Do not mix up the concepts of multiplication and addition.
  • Know how to multiply negative numbers, including knowing that the product of two negative numbers is positive.

Read on for a full solution.

Continue reading

SAT problem of the week, January 05, 2015

What is the product of -2 and -3? (Seriously, this is a real SAT question.)

  1. -6 (check answer)
  2. -5 (check answer)
  3. -1 (check answer)
  4. 5 (check answer)
  5. 6 (check answer)

Solutions, hints, and questions are welcomed. A full solution will be posted on October 9th. If you would like to learn how to enter math formulas into this blog, visit the WordPress LaTeX tutorial page.