Question

How do I write to tell how you would add 342 and 416

Answer 1

We can re-group them to add more easily. 

300 + 400 = 700
42 + 16 = 58

700+58 = 758

Answer: 758

Answer 2

You can regroup them by
300+40+2=342
400+10+6=416
700+50+8=758