Answer:
The first one is correct 1 + 2 (3 + 4). The second one is (1 + 2) 3 + 4.
Explanation: The plus sign can also be a dash ( - ) sign like the one used for the first line of beats. But they both represent the word "and" If you were to say the whole thing out loud it would sound like this, "One and two, three four. One two, three and four. I have been playing clarinet for about 4 years now and I learned the basics of rhythms in like 6th grade so this is fairly easy for me. Hope this helps ^-^