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The summer solstice in China lunar calendar is the shortest day and the shortest night in a year.
8.

Daylight: 24 ÷ (5+3) × 5 = 15 (hour)

Night: 24- 15 = 9 (hours)

9.

150:60: 15

=( 150÷ 15):(60÷ 15):( 15÷ 15)

= 10:4: 1

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