### Sometimes I have to laugh at myself

Sep. 13th, 2011 10:17 amSo I began to explain. "Imagine you're in a car. The car has a gas tank that holds 20 gallons of gas. After you've been driving for a while, you only have twelve gallons left. How many gallons of gas do you need to add to the tank to fill it back up?"

"But Mama, you wrote that the car's tank held 10 gallons!"

"I did? Oh. I'm so sorry, I meant 20 gallons. Please change it to 20 gallons. Now does it make sense?"

"Yes."

She then proceeded to correctly solve the problem, which involved filling out a chart showing how much gas you would need to put into the tank based on different values of how much was already there. I got this problem from MEP 2a, which I've been finding very useful for Erika's "Math Warmup." now if only I could copy the problems correctly!

Oops. At least she was in a good mood, so I think it was probably a positive experience involving asking for help before being totally frustrated, and hearing me apologize for a mistake. If it had happened in the afternoon when she was tired, it might have turned out differently...