(1)420 seconds = () minutes 180 minutes = () 7 o'clock on the 4th = ()

72 hours = () days 48 months = () years 2 weeks = () hours.

(2) There are () days in the first half of leap year and () days in the second half.

(3) Bashu School was founded in 1933 10, and this year 10 is her birthday.

(4) September has at most () Mondays and at least () Mondays.

(5) The following time is expressed by ordinary timing method.

15 () 9 (

) 23: 00 ()

18 hours ()

(6) Fill in "big moon" or "small moon" in brackets.

April ()

August (

) July ()

December () September ()

January (

)

(7) The day before 81is () month ().

(8) The day after June 30th is () month ().

(9) The number of days in the first () quarter of a normal year is the least, only () days; The first quarter of a leap year has () days, as many as the first quarter ().

Second, guess the birthday.

1. This nickname was born three days before Labor Day. Nickname's birthday is () month ().

Xiaogang's birthday is the penultimate day of the third quarter. Xiaogang's birthday is () month ().

Xiaohong's birthday is the last day of August. Xiaohong's birthday is () month ().

Xiaohua's birthday is the fourth day of the year. Xiaohua's birthday is () month ().

Xiaolan was born on Arbor Day. Xiaolan's birthday is () month ().

Third, I can solve the problem.

1. The florist sent 194 roses, and every 6 roses were tied into a bunch. How many bunches can I tie at most?

2. The store1-June * * sold 258 color TV sets, and how many sets were sold on average every month?

3. The school bought 18 boxes of chalk, 36 boxes each, and used half of them. How many boxes are left?

4. Cars, vans and buses

Four people, eight people, 56 people.

The fully loaded bus broke down on the road, and all passengers will change to other vehicles.

(1) If all passengers change vans, how many such vans do you need to call?

(2) If all passengers were replaced by carriages, how many such carriages would be called?