Question

4 km 315 m from 8 km 87 m
What is the correct answer
in book the answer is 3km772m is correct​

Answer 1

Answer:

Yes, it is correct check for clear explanation

Step-by-step explanation:

1 km = 1000 m

therefore 4 km = 4000 m + 315 m = 4315 m

and 8 km = 8000 m + 87 m = 8087 m

it says "from" so we should subtract

Th   H   T   U

 8    0    8   7

- 4    3    1    5

------------------------

  3   7     7   2

So the expanded form is

3000+700+70+2

3000 will be changed to 3km and the other 3 digits will be the rest of the meters

A: 3km 772m