1, some clocks have () needles, and the fastest one is () needles. It takes () seconds for the second hand to walk a big square and () seconds for a small square. Walking around is () seconds, which means () minutes.

2. The minute hand takes a small space (), and the minute hand takes a big space ().

3, 50 points less than 1 () points, 1 more than 45 points () points.

Our last class is (), and the break is (). Add () and it is 1 hour.

5. Dongdong began to write homework at 5: 20, and finished it in 15 minutes. When it is finished, it is () minutes.

6. Fill in the appropriate "hours", "minutes" and "seconds".

It takes about 3 () to brush your teeth in the morning. Xiaoming runs 100 meter needs 19 ().

We sleep about 10 () every day.

7.28 seconds is () times of 7 seconds, and 1 is () times of 20 minutes.

Second, choose carefully. (Put the serial number of the correct answer in brackets)

1. Our common time unit is ().

Hours, minutes, seconds, grams, kilograms, tons, meters, centimeters, decimeters.

2. It takes 10 () to do gymnastics once.

One hour, two minutes, three seconds

3. Half an hour is ().

A 50 minutes B 30 minutes C 50 seconds D 30 seconds

At 4.3 o'clock, the hour hand and the minute hand become ().

A straight line b acute angle c right angle d obtuse angle

5. The train leaves at 3: 00 p.m.15, and it takes 4 hours and 35 minutes to arrive at ().

A 1 hour B 1: 20, C 7: 50 and D 8: 00.

Third, I am a fair little judge. (judging right or wrong)

1, the minute hand turns once 1. ( )

Mom gets up at 7 o'clock in the morning. ( )

3, 100 sec = 1 min ()

The news broadcast starts at 7 pm. ( )

5.half an hour is 30 minutes. ( )

6. It is 1 to walk a big grid in the minute hand. ( )

7. The shortest pointer on the clock face is the minute hand. ( )

8. When the second hand turns, the hour hand takes a big step. ( )

9. Mom works 8 hours a day. ( )

10, Xiaoming arrives at school at 2: 00 pm, finishes school at 4:30 pm, and stays at school for 2 hours and 30 minutes in the afternoon. ( )

Fourth, calculate and fill in.

1. Do the math.

1 min = () sec 4 hours = () min 120 sec = () min 8 min = () sec.

9: 00 = () 180 = () 360 seconds = () 300 seconds = ()

3: 00 +4: 00 = () 58-33: () 4 1 sec-19 sec = () sec.

20 minutes +40 minutes = () hours 50 seconds+10 seconds = () minutes 20 minutes +40 minutes = () hours.

2. Compare and fill in. (Fill in ￠ ￠, ￠ or ￠ = ￠)

8 minutes 80 seconds 6 hours 36 minutes 3 hours 300 minutes 120 seconds 2 minutes.

70 seconds 06 minutes 1 minute 2 1 second 8 1 second 1 hour 12 minutes 72 minutes.

I can calculate in tabular form.

How many seconds is three times 1.20 seconds?

2. How many hours passed from 2: 30 pm to 5: 30 pm?

How much more is 3.3 hours than 80 minutes?

Sixth, I am best at solving practical problems!

1. Xiaoming and his father buy train tickets in Shanghai and answer questions according to the train timetable.

(train timetable)

Train arrival departure time arrival time

K802 Wuxi 6: 00 7: 32

S064 Zhenjiang 6:43 1 1:33

T702 Nanjing 7:00 9:57

(1) How long did it take them to get from Shanghai to Wuxi?

(2) How long does it take them to get from Shanghai to Zhenjiang?

(3) How long does it take them to get from Shanghai to Nanjing?

A football match takes 90 minutes. If it starts at 5 pm, when should the football match end?

3. Look at the broadcast schedule and answer the questions.

06: 30 Media program

07: 00 Chronicle

07: 30 World

08: 00 live broadcast time

08: 30 sunset red

Samsung Smart Express 10

1 1: 00 weekend health road

(1) Dad is going to read the chronicle after getting up. Dad should get up before ().

(2) "Live Time" started broadcasting in ().

(3) The world is about () minutes.

It's half past eight now, and Xiaoming has already started doing his homework. He wants to watch Samsung Smart Express, and he can do his homework at most.

The school reading room opens at 8: 30 am on Saturday, and Xiaohong arrives at the reading room door at 7: 45. How long will she have to wait?

5. A class lasts 40 minutes. Students begin classes at 8:40 after morning exercises, with recess 10 minutes. When is the second class?

Thinking about the problem:

A badminton match starts at 3: 30 pm and lasts 135 minutes. What time does the game end?