Given 15 problems all involving the factor 9. How long should it take a fifth grader to complete these problems perfectly?
2006-12-18 10:45:27 · 2 answers · asked by psycho-cook 4 in Education & Reference ➔ Primary & Secondary Education
If your fifth grader can solve them correctly, without coaching, encouraging, coaxing or threatening. Does it really matter how long it takes?
If he/she MUST do them quickly, I myself personally prefer the trick of doing them on my fingers. Looking at the backs of your hands bend down your pinky on your left hand. 1 X 9 = 9. Now only bend the ring finger of the left hand. 2 X 9 = 18 (the one being the finger on the left of the ring finger, the 8 being the rest of the fingers) and so on until the end. In this manner, I would expect it would take 5 minutes or less to solve all 15.
In my humble opinion, speed is secondary to the process of being able to solve the problem.
From a chemical engineer who STILL does not know her multiplication tables by heart.
2006-12-18 11:02:46 · answer #1 · answered by dakirk123 3 · 0⤊ 0⤋
20 minutes
2006-12-18 18:47:43 · answer #2 · answered by miyshoe 4 · 0⤊ 0⤋