What decimal represents the amount each boy shades?

Question

high order thinking. three boys cut out hundredths decimal models. derrick does not shade any of his models. ari shades half of one model. wesley shades two models and one tenth of another model. what decimal represents the amount each boy shades?

Answer 1

So, Nicole, it should be obvious that Derrick's shading nothing represents 0.

 

Ari shades half of one hundredth, or .5/100. We don't normally put a decimal in a fraction, but if we multiply by 10/10, we get 5/1000, or .0005.

 

Two models gives us .002. When we take 1/10 of something, it's the same as dividing by 10, where we move the decimal one place left. 1/10 of .001 is .01. Add the two and 1/10 and we get .012.

 

Hope this helps!