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mr burns class is taking a field trip to the planetarium. The trip will cost $27 for each student. There are 18 students in his class. Use compatible numbers to estimate the total cost of the field trip.

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natasha16
so, 27=30 and 18=20 rounded 

so what you would do now is multiply 30 x 20 and you get $600
The correct answer is 30 times 20 equals 600.

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