8 + 0.4 + 0.07 + 0.008 is your answer. But all you had to do is separate your numbers with working on the biggest number to the smallest number.
The answer stays in school kids I'm not really sure on the answer to ask your teacher.
Step-by-step explanations
explanation is in the image above hope this helps please mark me brainiest
Use the calculator and multiply all three of the numbers.