Mr. R.’s World of Math

Page 4: Snack and Lunch

“Should I eat this one? No, how about this one! No! This one looks the best!” she sang as she tried to decide which cupcake to eat first. As the witch continued to think, I wrote a note on a piece of paper and tossed it to Hannah. It said:

note on notepaper

Hannah read the note, nodded, and reached over to the test tubes with the chemicals in them. The snack-witch was now sticking some candles into the cupcakes. I guessed she was going to have a birthday celebration with Jake’s cupcakes right in front of our faces. 

purple beakerI watched Hannah as she tried to remember how to mix the chemicals again. She poured some into the glass beaker, but nothing happened. 

She looked frustrated and tried again. Still nothing happened. 

The snack-witch blew out the candles. “I guess that means good luck for me,” she said as she lifted a cupcake and began to smell it.

I quickly threw Hannah another note, it said:

Your total mixture weighed 483 grams. You put 297 grams of chemical #1 in, figure out the difference to find out how much of chemical #2 you need to put in.

How much of chemical #2 did Hannah need to put in?

Enter the number of grams here:

Your results

Hannah added the correct amount of chemical #2, and the Blue gas filled the room just as the snack-witch was about to gobblesnack witch down the cupcake. The gas passed in front of her mouth and sealed it shut. We could see her trying to open her mouth with no luck at all! A look of anger and frustration come over her face, and a moment later the snack-witch disappeared, and the cupcake dropped back down into the tray.

As soon as the snack-witch disappeared, my students and I realized we could speak again, and we were no longer stuck to our chairs. 

“Hurry, everyone! Out of the classroom now! We don’t want to breathe that gas!” I yelled.

We all rushed out of the classroom to safety.  cupcakes cartoonOf course I remembered to grab the box of birthday cupcakes and bring it outside with us. 

When we were all outside, I said, “I guess we’re having cupcakes for snack AND lunch today. I passed them out to my students and we all agreed it was the best snack and lunch we’d had that entire year. 

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