Winter vacation homework 1, the first volume of mathematics in the second grade of primary school. (20 points)

1. stands for the weight of lighter items and is often used as the unit (). Represents the weight of a heavier item, often used as a unit ().

2.5000 g = () kg 6 kg = () g.

200 g +800 g = () g = () kg

3. One bag of salt weighs 500 grams, and two bags of this salt weigh () grams, which is () kilograms.

4.5 A loaf of bread weighs 300 grams, and a loaf of bread weighs () grams.

5. Fill in ">" in ○. , "<, or" = ".

8,000 grams, 9 kilograms, 4 kilograms, 4,000 grams

3kg○2990g 1kg 10 10g

2kg 1200g 3000g 3kg

6. The weight of a big buffalo is 499 kilograms, which is about () kilograms.

Second, choose one of the three kinds of happiness. (2 points for each small question, ***8 points)

1. 18 eggs weigh about 1 ().

Arab rubber company

2. 1 kg sand ()1000g cotton.

A.& gtB. & ltC.=

3. 1 glass of water weighs 240 grams, 10 glass of water weighs () grams.

240 years

4. Buying 1 kg bananas requires 3 yuan money, and the existing 15 yuan can buy () kg bananas.

5,000 years

Third, I will judge. (Mark "√" for the right and "×" for the wrong) (2 points for each small question, 12 points)

1. The weight of a pig is 280 grams.

2. A volleyball weighs 400g.

3. 1 Skipping rope is 5 kg long.

4.2900g is greater than 3kg.

Xiao Ming weighs 30 grams and can eat 50 kilograms of steamed buns at a meal.

6. Mom's height 160 cm and weight 50 kg. Mother is lighter than her height.

Fourth, arrange the following weights in order from light to heavy. (7 points)

5. I can calculate. (26 points)

1. Write the number directly. (2 points for each small question, ***20 points)

7000+600= 72÷9= 28÷4= 700-600=

12×3= 0×24= 65+40= 900+ 100=

1 kg+2kg = 50kg-20kg =

2. Column calculation. (6 points)

1.35 How many 5s are there?

2. The dividend is 48 and the divisor is 8. What is the quotient?

Sixth, solve the problem. (27 points)

1. Xiaodong bought 8 Jin of watermelon with 20 yuan money and went to 4 yuan. How much is a kilo of watermelon? (4 points)

The fruit shop brought grapes and oranges. Grapes weigh 9 kilograms, and oranges weigh 0.3 times as much as grapes. How many kilograms are grapes and oranges? (5 points)

3. The original rice of the canteen 1300kg. After eating 300 Jin, how many Jin is left? Later, I bought 1000 kg. How many kilograms of rice are there in the canteen now? (6 points)

There are two glasses of water. The first glass of water weighs 240 grams, the second glass of water weighs 200 grams, and how many grams does the second glass of water weigh? How many grams are there in two glasses of water? (6 points)

5. Mom bought a big loaf, weighing190g, and four buns, each weighing 50g. How much do these breads weigh? (6 points)

Winter vacation homework, the first volume of mathematics in the second grade of primary school. (***20 points)

42+20= 30+29= 8×3+6= 0×3= 4×7=

5×3= 8×8= 9×3-7= 9×6= 53-3+9=

6×7= 18+60= 8×5= 37-32-5= 8×3+4=

7×5-3= 8×7= 38- 18+25= 9+57= 3×4+9=

Fill in the blanks. (*** 16)

1，50m-25m = () 3m- 100cm = () m。

32 cm–19 cm = () cm 20m+80m = () m.

( )×6=30 ( )×8=48 ( )×( )= 18

7 ×( )=42 ( )×9=27 ( )×( )=36

2, three children, a table tennis match, every two people, a * * * to play a game.

3. What can I fill in the following ()?

()×6 & lt； 27()& lt； 3×7()×8 & lt； 65

()5×()4×()7×()45 & gt； 9×()×6 & lt； 15

4. Six 3' s are added, and the multiplication formula is (), which is pronounced as ().

5. Fill in the appropriate unit name.

A marker is about 10 () long. Mom is 1( )62 ().

The classroom is about 10 () long. This wooden bed is about 2 () long.

6. Fill in "+","-","X" or "=" in ○.

8○6=48 36○73-37 9×7○65

2○2=4 43○6×7 18○9=9

Third, multiple-choice questions, choose the serial number of the correct answer and fill in the brackets. (*** 10 point)

What is the sum of 1 and five 3s? The correct formula is ()

a、5+5+5= 15 B、5+3=8 C、5×3= 15

2. There are () two digits, consisting of 2, 6 and 0.

a、2 B、4 C、6、

3, 5+5+5+4 cannot be rewritten as formula ().

a、5×4 B、5×3+4 C、4×5- 1

4, four good friends meet and hug each other once, * * * to hug () times.

A, 3 times b, 4 times c, 6 times

5. In the following lines, the line segment is ().

① ②

③ ④

Four. Judgment: (***5 points)

The sum of 1 and 9 4s is 13. ( )

2. The height of Xiao Qiang is about137cm. ( )

3. Every corner has an endpoint and two sides. ( )

4. It takes 1 minute to walk clockwise. ( )

5. 1 linear length 100 meter. ( )

Verb (abbreviation of verb) Draw a picture: (***8 points)

1. Draw a line 2 cm shorter than 10 cm.

2. Draw an acute angle, a right angle and an obtuse angle on the square paper.

Sixth, calculation. (***20 points)

1, calculated vertically. (12)

67+32= 46+28+23=

96-54= 82-37- 12=

2. Column calculation: (***8 points)

(1) What is the sum of five 7s?

(2) Both addends are 18. What's the total?

(3) One multiplier is 6 and the other multiplier is 4. What is the product?

(4) What is the number 15 more than the sum of six 9s?

Seven, the use of mathematics. (*** 18)

1, each bus can take up to 9 people, and how many people can four buses take up to?

A: Four buses can take at most () people.

The fruit shop sent 48 boxes of fruit in the morning and 37 boxes in the afternoon.

(1) How many boxes of fruit are shipped a day?

A: * * * Deliver () boxes of fruit every day.

(2) 56 boxes have been sold, how many boxes are left?

A: There are () more boxes.

There are 43 female teachers in the school, and there are 27 fewer male teachers than female teachers. How many teachers are there in the school?

There are teachers () in the school.

4. A teapot 32 yuan and a teacup 4 yuan.

How much does it cost to buy 8 teacups and 1 teapot?

A: It costs () yuan to buy 8 teacups and 1 teapot.

② Can you ask other math questions and answer them?

Answer:

First, write the number directly. (***20 points)

62 、59、30、0、28 、 15、64、20、54、59、42、78、40、0、28、32、56、45、66、2 1

Fill in the blanks. (*** 16)

1, 24m, 2m, 13cm, 100m, 5,6,2× 9 or 3× 6,6,3,6× 6 or 4×9.

Two or three games.

3、4、20、8、44、5、3、4、4、2

4. 6×3= 18 Pronunciation: 6 times 3 equals18; 3×6= 18 is pronounced as: 3 times 6 equals 18.

5.10cm,1.62cm,10m, 2m.

6. Fill in "+","-","X" or "=" in ○.

"×"、"="、 ""、"-" 。

Three. 1，C，2，B，3，A，4，C，5，④

Four. 1, ×2, √3, ×, 4, ×, 5, ×

Verb (abbreviation of verb) Draw a picture: (***8 points)

1, draw an 8 cm line segment.

2. Right angles should have corner markers.

Six, 1, 67+32=99 46+28+23=97

96-54=42 82-37- 12=33

2、( 1)5×7=35(2) 18+ 18=36(3)6×4=24

(4)6×9+ 15=69

Seven, 1, 9×4=36 (person)

2.①48+37=85 (box) ②85-56=29 (box)

3, 43-27+43=59 (person) 4, ①4×8+32=64 (yuan)

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