On friday, 278 fourth graders went on a field trip to the arizona state museum. the staff divided them into 7 tour groups. which is the best estimate of the number of students in each tour groups?

assuming you mean addition: addition and subtraction are reverse operations.

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this is a very good question

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i got a hair cut today from my mom not to flex just to flex kim jon un is one rad fellow i'd say you'd need to take the hairline in kinda like a box shape like someone rammed a lego brick into your head. from there you really need to take the top up keeping with that boxy aesthetic, finally coat the whole thing with gel if your country economics are failing or whatever you can just coat it with the starving children's food rations. about 5 orphans per strand is a good ratio. good luck with the fresh cut my dude