The rounded two decimal places are 7.0. The maximum value of this two decimal places is (7.04) and the minimum value is (6.95).

A bus stop in a city 1 bus runs every 6 minutes, and bus No.3 runs every 10 minutes. At 6 o'clock in the morning, 1 and bus No.3 leave at the same time. After (30) minutes, 1 and bus No.3 leave at the same time.

35+ 1=36 (pieces)

56-2=54 (piece)

The greatest common denominator of 36 and 54 is 18, so the kindergarten class has at most 18 children.