1) The car travels 60 () per hour.
2) A piece of rubber weighs about 5 ().
3) The basketball court covers an area of about 450 ().
4) A coal bunker covers an area of 10 ().
5) The area of a handkerchief is about 4 ().
6) The area of a standardized football field is about 1 ().
Fill in the appropriate numbers in the brackets.
1)2 5/8 days = () days () hours
2)3: 20 = ()
3)4 tons and 50 kilograms = () tons = () kilograms
4)3.3 hours = () minutes
5) 1.5 minutes = () seconds
6) When 80 points = ()
7)6 hectares and 6 square meters = () square meters
8)5 1/3 hours = () hours () minutes = () minutes
3. Fill in the brackets with ">" and ".
1)8 tons () 800 kg
2) 1.5 () 1.50.
3)5 square meters and 8 square decimeters () 5.8 square meters
4)500 seconds () 9 minutes
4. judge.
1) Length, area, quality and time are all quantities. ( )
Verb (abbreviation for verb) selection.
1) Roll a piece of white paper with a width of 16 into the largest cylinder, and its volume is about 1 ().
A. cubic decimeter cubic centimeter
Order of intransitive verbs. (in descending order)
1) 65g，0.65kg，0.0065t。
( )
2)53 cm, 5 3/5 decimeter and 3/5 meter.
( )
3)8300 cubic centimeters, 8 liters and 30 milliliters, 8 cubic decimeters and 3 cubic centimeters.
( )
4)4.002 liters, 4 cubic decimeters, 200 cubic centimeters, 4 liters, 20 ml.
( )
5)6.3 cubic meters, 6 cubic meters, 3 cubic decimeters and 630 cubic decimeters.
( )
6)8:30, 8.3, 8 and 3/5.
() 1. Fill in the appropriate units in brackets.
1) The car travels 60 kilometers per hour.
2) A piece of rubber weighs about 5g.
3) The basketball court covers an area of about 450 square meters.
4) The area of a bunker is 10 (m2).
5) The area of handkerchief is about 4 (square decimeter).
6) The area of a standardized football field is about 1 (square kilometers).
Fill in the appropriate numbers in the brackets.
1)2 5/8 days =( 2) days (15)
2)3: 20 =(3 and 1/3)
3)4 tons and 50 kilograms =(4.05) tons = (4,050) kilograms
4)3.3 hours =( 198) minutes
5) 1.5 minutes = 90 seconds
6)80 o'clock =( 1 and 1/3)
7)6 hectares and 6 square meters =(60006) square meters
8)5 1/3 hours =( 5) hours (20) minutes =(320) minutes.
3. Fill in the brackets with ">" and ".
1)8 tons (>) 800 kg
2) 1.5 (
3)5 square meters and 8 square decimeters (
4)500 seconds (
4. judge.
1) Length, area, quality and time are all quantities. (right)
Verb (abbreviation for verb) selection.
1) Roll a piece of white paper with a width of 16 into the largest cylinder with a volume of about 1(B).
A. cubic decimeter cubic centimeter
Order of intransitive verbs. (in descending order)
1) 65g，0.65kg，0.0065t。
(0.0065t，0.65kg，65g) 0.65kg = 650g 0.0065t = 6.5kg
2)53 cm, 5 3/5 decimeter and 3/5 meter.
(3/5 meter, 53/5 decimeter, 53 cm) 5 3/5 decimeter =56 cm 3/5 meter =6 decimeter.
3)8300 cubic centimeters, 8 liters and 30 milliliters, 8 cubic decimeters and 3 cubic centimeters.
(8300 cubic centimeters, 8 liters and 30 milliliters, 8 cubic decimeters and 3 cubic centimeters)
8300 cubic centimeters =8 liters 300 ml
8 liters 30 ml =8030 ml 8 cubic decimeters 3 cubic centimeters =8 liters 3 ml
4)4.002 liters, 4 cubic decimeters, 200 cubic centimeters, 4 liters, 20 ml.
(4 cubic decimeters equals 200 cubic centimeters, 4 liters equals 20 milliliters, 4.002 liters)
4 cubic decimeters 200 cubic centimeters =4.2 liters, 4 liters 20 ml =4.02 liters.
5)6.3 cubic meters, 6 cubic meters, 3 cubic decimeters and 630 cubic decimeters.
(6.3 cubic meters, 6 cubic meters, 3 cubic decimeters, 630 cubic decimeters)
6 cubic meters and 3 cubic decimeters =6003 cubic decimeters.
6)8:30, 8.3, 8 and 3/5.
(8 3/5, 8: 30, 8.3) 8: 30 =8.5 8 3/5 =8.6 ▲ Generally speaking, there are few yuan-jiao phase additions and borrowings in the first grade, so let's start with the general ones.
Such as 6 yuan 3 Angle +7 yuan 6 Angle = () Yuan () Angle, repeated countless times, Yuan and Yuan plus, Angle and Angle plus. I often practice for many times. When I see this kind of topic, I find 6 yuan and 7 yuan in a conditioned way, and add them together, 3 angles and 6 angles, and add them together.
In particular, the problem is: 6 yuan 3 Angle +5 yuan = () Yuan () Angle.
6 yuan 3 Angle +5 Angle = () Yuan () Angle.
In this way, the concepts of adding elements and adding angles can be formed.
▲ Unit conversion: recite 1 yuan = 10, 1 = 10, in turn, let him recite 10 = 1. In this way, he can skillfully handle such topics as 7 yuan = () angle and 60 points = () angle.
Difficulty: 25 angle = () yuan () angle. After a series of explanations, I found that the more vague the explanation, the more I let him form the concept of regularity. The angle of 1 1 is 1 yuan 1, and the angle of 58 is 5 yuan 8. After knowing how to do it, infiltrate the concept and tell him how many tens there are (that is, how many tens), that is, how many yuan there are, and how many horns there are.
Therefore, 56 points = () Angle () points, very easy to conquer.
▲ The last difficulty is the title: 4 yuan 8 Angle +2 Angle = () yuan, which seems simple, but it is not easy to explain. I taught him the concept of mathematical transformation, which was useless.
At first I asked him to count, and he was happy to count. Counting from 1 angle, 1 angle, 2 angle, 3 angle, ... 9 angle, 1 yuan, 1 yuan, 1 yuan 2 angle, ..., so he quickly grasped the law. From this, it is slowly extended to 1 yuan, and the angle of 8 +2 is 2 yuan. After a few questions, I have been able to do such questions correctly.
▲ After mastering all the above topics, the "expansion exercise" in the synchronous exercise book has such a question: Take 10 yuan and spend 60 cents to buy 4 yuan, how much will you get back? The level of the first grade, the number will not be too much. For such a topic, I taught him to use 100 angle -46 angle = 54 angle, and he could clearly convert it. In 5 yuan, 54 angle = 4 angle.
1, the understanding of various RMB is 86.00 yuan = () yuan () jiao 15.90 yuan = () yuan () jiao 12.50 yuan = () yuan () jiao 2, and the unit of yuan jiao is converted into 1 yuan =. 75 angle =( 1 yuan = () fen 2 yuan 3 angle = () angle 54.32 yuan = () yuan () angle () yuan () angle 4 yuan 5 angle +4 angle = () yuan () angle 3. Choose a suitable RMB unit. Pencil box 10 () eraser 8 () clothes 50 () pencil 5() 4, ballpoint pen 2 yuan, pen 4 yuan, ink bottle 3 yuan, ruler 1.9 yuan. If you spend 10 yuan on shopping (1), you can buy () a ballpoint pen (2), three pens are short (), (3) you can get back () yuan (4) by buying two bottles of ink. Please estimate that you can buy () a ruler. (5) The price of1pen is () points more than that of two rulers. (6) There are several ways to use up10 yuan. Please use the formula to express! 1. Fill in the blanks with 1, and you can change a 1 dollar (50 cents). You can change 2 yuan bills, 50-cent bills, 20-cent bills and 50-cent bills. ) 1 angle, you can change () 2 angle, you can change () 1 angle. ) 2 yuan, can be replaced by () 5 yuan. 4. One 10 yuan convertible () one 1 yuan, and (5) one 5 yuan convertible () one 1 yuan. 6, a 5 yuan convertible (7, a 20 yuan convertible (8, a 50 yuan convertible (9, a 100 yuan convertible (10, the RMB unit is (2, calculate 3 yuan =( 9 yuan =( 1 yuan 5 jiao =( 3 yuan 8 jiao = (. ) Zhang 1 yuan. ) 10 yuan, which can be changed to () (,) (,). ) Zhang 50 yuan's. 50 Angle =( 80 Angle =( 14 Angle =( 16 Angle =( 4 Angle +6 Angle = () Angle = () Yuan () Angle = () Angle) Yuan 4 Angle +5 Angle+. Write the price 18.00 Yuan () (9.30 Yuan () Yuan () Jiao () Yuan (2.00 Yuan) (37.00 Yuan) Yuan () Jiao () Yuan () Jiao (2.40 Yuan) Yuan () Jiao 0.50 Yuan () Jiao 4. Solve the problem in Le Ballon Rouge: 0.50 yuan per yellow balloon 1. 0.80 yuan per white balloon in 20 yuan)) How much is a pencil 2 (a basketball 25 ()) a ruler1(a bottle of drinks 3() )5() (1) A Le Ballon Rouge and a yellow balloon? (2) How much is a yellow balloon and a white balloon? (3) How much should Xiao Ming get back when he bought one with 3 yuan money? (4) How much is the white balloon less than the yellow balloon? (5) Is it enough for Xiaoqing to buy these three kinds of balloons with 2 yuan money? Write down the following amount. (1) One RMB 10, one 5 yuan, one RMB 1(2), one 5 yuan, one 2 yuan, one RMB 50 (3), one RMB 50, three RMB 10, one 2 yuan (4). (2)3 yuan 50-point ballpoint pen, 1 yuan eraser. Do I have enough money for 5 yuan? (3) A box of watercolor pens 12 yuan, palette 4 yuan. How much does it cost to buy these two? I paid 20 yuan, the salesman. How much do I need to get back? Simple calculation: simple calculation: 5 angle +5 angle = 5 points +7 points = 7 yuan 2 angle +3 yuan = 8 yuan 7 angle -5 angle = 7 yuan 6 angle -4 yuan 5 angle = 8 yuan 9 angle +4 yuan 6 angle = 1 yuan -5 angle = 0.50 yuan+1.50 yuan = 50 yuan 50 yuan. 0 yuan 8 Angle = 3 yuan 6 Angle +7 yuan 7 yuan 7 Angle +7 Angle = 2 yuan 5 Angle -0.70 yuan = 70 yuan (() yuan () yuan () angle).