Aschool principal ordered 1000 pencils he gave an equal number to each of seven teachers in till he had given out as many as possible how many pencils were left

Amber had 1/6 of a pie left after the bake sale. rihanna had 3/8 of a pie left. what fraction of a pie did they have altogether?

The weight of an object in a particular scale is 175.2 lbs. the measured weight may vary from the actual weight by at most 0.1 lbs. what is the range of actual weights of the object

How do i do this? i don’t understand