49.005

-7.157 show how you would work it out. Having trouble trying to explain it to my daughter with this common core math.

My suggestion:Put the two numbers on top of each other 49.005 and use the regrouping method 7.157

48.99 15 subtract 7.157 that way to make the form 40-0 8-7 0.9-0.1 0.09-0.05 and 0.015-0.007 for the answer 41.848

I believe you line the decimals up, the biggest number goes on top and the smallest on bottom.