# 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:

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.

I 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: