"Beautiful Street Scene" PPT Courseware 2

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"Beautiful Street Scene" PPT Courseware 2

Easy way to multiply two digits by two digits

For example: 46×12=?

It can be calculated like this: 12 is composed of 10 and 2. We can first calculate 46×2=92, then calculate 46×10=460, and add 92 and 460 to get the number 552.

It can also be calculated like this:

Have you learned it?

Calculate and check

1. 23X60= 2. 65X99=

3. 55X44= 4. 98X10=

5. 87X87= 6. 99X88=

Do it:

The distance between Xiaohong's home and school is 22 miles, and it takes him 2 minutes to walk. At this speed, it takes him 10 times to get to Xiaoming's home, which is 10 times the distance to school. How many minutes does it take Xiaohong to walk to Xiaoming's home?

22÷2=11 (miles)

22X10=220 (miles)

220÷11=20(minutes)

Answer: It takes Xiaohong 20 minutes to walk to Xiao Ming’s house.

Ahri went to Taozi's house to play. A circle in the park is one centimeter. Ahri walked 44 times in the park. Taozi was 10 times as big as Ahri. How many laps did Taozi walk?

44X10=440 (circle)

Answer: Taozi walked 440 times

choose:

1. The highest quotient of 346÷6 is ( ).

①Hundreds digit ②Tens digit ③Unit digit

2. There is 0 in the middle of the dividend and the middle of the quotient ( ).

①There must be 0 ②There is no 0 ③Unable to determine

3. Two squares with a perimeter of 8 cm are put together to form a rectangle. The perimeter of this rectangle is ( ).

①16cm ②24cm ③12cm

1. There are 4 classes in the third grade of Xinxing Primary School. Each person donates an average of 3 yuan, and the total donation is 576 yuan. How many students are there in each class on average?

2. A storybook has 252 pages. Xiaoli reads 8 pages every day. After 25 days of reading, has she finished the book?

3. Wang Hong walked from the first floor to the fifth floor. She had to walk 18 steps for each floor. How many steps did she have to walk in total?

4. There is a square fish pond in the garden. Its circumference is 64 meters. What is its area in square meters?

I can fill in

1. There are ( ) zeros at the end of the product of 200×5.

2. 48.95 is pronounced as: ( ), 60.07 is pronounced as ( ).

3. When the car is driving, the wheels make ( ) motion and the body makes ( ) motion.

4. A square has ( ) axes of symmetry, and a rectangle has ( ) axes of symmetry.

5. 5 yuan and 2 jiao = ( ) yuan, 9.42 yuan = ( ) yuan ( ) jiao ( ) cents.

6. 3 yuan, 50 cents and 7 cents + 6 yuan, 4 cents and 3 cents = ( )

7. Five times of a number is 200. This number is ( ).

8. The product of the smallest three-digit number and the largest one-digit number is ( ).

judge

1. Decimals with more digits are larger than decimals with fewer digits. ( )

2. Teacher Lin’s height is 165cm, which is 1.65m. ( )

3. Going up stairs is a rotational motion. ( )

4. Integers are larger than decimals. ( )

5. When two digits are multiplied by two digits, the product may be three digits or four digits. ( )

Vertical calculation and verification

36×24= 24×54= 30×57=

32×15= 45×36= 37×27=

42×36= 27×51= 43×62=

Solve the problem

1. A garment factory produced 9,548 sets of clothing in March this year. How many sets of clothing are produced per day on average?

2. How many days are there from June 1st (including this day) to August 25th (including this day)?

3. A train from Beijing to a certain place left at 10 a.m. today and arrived at 1:00 p.m. the next day. How much time passed on the way?

4. An airplane flies from point A to point B at a speed of 850 kilometers per hour. It takes off from point A at 10:00 and arrives at point B at 16:00. How many kilometers are there between places A and B?

encourage everyone

The formula for multiplying two digits by two digits is not difficult. As long as you do the calculation with your heart, it is not difficult. As long as you do it in writing, you will definitely succeed! come on! come on!

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Update Time: 2024-09-22

This template belongs to Mathematics courseware Qingdao Edition Third Grade Mathematics Volume 2 industry PPT template

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