Seow Yu Xuan's answer to tiffany's Secondary 1 Maths Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Seow Yu Xuan
Seow Yu Xuan's answer
12 answers (A Helpful Person)
Time cannot use add minus I think is correct so time line them cauculate like minus 5.30 - 4.08 the answer is 1.22pm and the last one I don't know.