Each sheet of stickers contains 1000 stars. The stars are arranged in 20 by 50 each sheet.

Mr.Tinker used 3894 stickers during the first grading period. How many sheets was this?
I say it's 4 sheets, correct? Thank you for your help.

To determine how many sheets Mr. Tinker used, we need to divide the total number of stickers used by the number of stickers on each sheet.

The total number of stickers used is given as 3894.

Each sheet contains 1000 stickers, arranged in a 20 by 50 format, which means there are 20 rows and 50 columns.

To find the number of sheets used, we divide the total number of stickers used by the number of stickers on each sheet:

Total number of stickers used / Number of stickers per sheet = Number of sheets used

3894 stickers / 1000 stickers per sheet = 3.894 sheets

Since we can't have a fraction of a sheet, we need to round up to the nearest whole number. Therefore, Mr. Tinker used a total of 4 sheets of stickers during the first grading period, not 3.894 sheets.

So, your answer is correct - Mr. Tinker used 4 sheets of stickers.