May I cut in with a question? During the school year, DS answered a word problem 'Write out the sum for 10 girls have 3 apples' and he wrote '10x3=30', which was marked wrong but the teacher didn't explain why it's wrong. Can someone explain it to me?
I would've written and solved the given word problem in the same way that your DS did. Now that I understand that is not what the teacher wanted, I key in on the word "sum" and think that possibly the word "sum" is a clue that this word problem is to be solved by addition, not multiplication, therefore 3+3+3+3+3+3+3+3+3+3=30 comes to mind.
Repetitious.
Tedious to think about.
Laborious to write.
Error prone.
Not my thing.
