Question

A piece of chalk weighs 20.026 grams. A student writes their name on the sidewalk ten times, then weighs the chalk again. The new mass is 19.985 grams. How many grams of chalk did the student use to write their name ten times?

Answer 1

0.041 grams.

Explanation:

Question is answered using subtraction,
they started with `20.026` grams and ended with `19.985` grams.

That means they used `20.026` `-` `19.985` grams of chalk to write their name ten times.

`20.026` `-` `19.985` `=` `0.041`