Answered

Window washers had 5 days to clean 1,500 windows in a mall. The first day they cleaned 284 windows, the second day 298, the third day 317 and the fourth day 305. How many windows should be cleaned on the last day?

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Ryoung0709viz
For the calculations it is first to 298+317+284+317= 1 216 then the final is 1 500 -1 216= 284 windows for the last day. :)