The second volume of mathematics in the second grade of a primary school is prone to mistakes.
Fill in the blanks. (1)6050 writing (), 4078 pronunciation ().
(2) There are () hundreds in thousands, and 10 thousand is ().
(3) The number of 6,500 is (), which is pronounced as ().
(4) 1kg =()g； 8000 g = () kg.
(5)6 times 9 is (), and 56 is () times 8.
The four digits of (6) are (), which is less than 10000 ().
(7) Put an average of 36 apples on four plates, and put () apples on each plate.
(8) Number 1 10, and write the last three numbers.
3980、()、()、()。
(9) 72 ÷ 8 = (), and the formula used in the calculation is ().
(10) Fill in the appropriate units in brackets.
A bag of salt weighs 500 pounds.
Xiaolan's weight is 42 ()
Xiaogang's height is 135 ()
Second, calculation.
(1) oral calculation.
29+40= 800-300= 4000+6000= 5400-400=
65-29= 3700+600= 28-7= 3200-400=
45+38= 36+36= 48-39= 34- 15=
8×8= 54÷9= 32÷4= 7×5=
6×4-9= 63-8-20= 40÷5+29=
30÷6×4= 8 1÷9÷3= 76-(6+24)=
(2) Use vertical calculation.
370+80= 540-90= 820-390=
470+360= 630+270= 750-250=
(3) Formula calculation. (8 points)
1, both addends are 280, what's the total?
How many times is 2,63 9?
3. Divide 42 into 6 equally. How much is each part?
How much is 4.9 more than 5 times that of 9?
Third, draw a picture and circle it.
(1) Draw an acute angle.
(2) Draw a right angle.
(3) Draw an obtuse angle.
Fourth, use mathematics.
1. There are 4 boxes of rubber balls in the shop, 6 in each box. Twenty have been sold, how many are left?
2. A car has 32 passengers and 9 people get off at the post and telecommunications building. There are 13 people coming up again. How many passengers are there in the car at this time?
I bought 18 science and technology books and 24 story books in the third grade. Distribute these books equally to six classes in Grade Three. How many books are distributed in each class on average?
4. The school carried out tree planting activities and returned 76 saplings. I took 27 trees in the fifth grade and 33 trees in the sixth grade. How many seedlings are left?
The second primary school, the second grade, and the second volume of mathematics are prone to mistakes.
1. Numbers written directly: 24+46 = 56-28 =12+68 = 99-73 =
59-56= 23+35= 44-28= 27+48=
59- 15= 47+53= 94- 10= 88-60=
Second, with vertical calculation:
42+39= 38+36= 94- 16= 53-36=
Third, off-model calculation.
15-324= 80-79= 40+26= 12-3+57=
Fourth, solve the problem:
1. There are 26 small balloons in the store, 15 large balloons. How many big balloons are there less than small balloons?
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2. There are 38 girls in the choir, 16 boys. How many boys are less than girls?
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Xiaoming keeps 36 rabbits and Xiaohong keeps 24 rabbits. How many more rabbits does Xiaoming have than Xiaohong?
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There are 35 boxes of red balloons and 20 boxes of yellow balloons in the shop. How many boxes are there in the yellow balloon than in the red balloon?
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The second volume of mathematics in grade two of grade three primary school is prone to mistakes.
1, 14 □, divided into 3 parts on average, each part has (), and there is () left. Formula: □○□ =□………… □
2. What figures can be filled in? Please write six different formulas.
□÷□=5……3
□÷□=5……3
□÷□=5……3
□÷□=5……3
□÷□=5……3
□÷□=5……3
3. The supermarket costs 8 yuan for four bags of biscuits, and how much for nine bags of biscuits? ?
4、? In the tree planting activity in March 12, the school bought 4 bundles of seedlings, 6 in each bundle and 8 in each row. How many rows can you plant?
5. There are 25 wheels. How many tricycles can you hold at most?
6. 3 boxes of table tennis, 8 in each box, distributed to 3 children on average. How much is each child? How much is left?
7. There are 53 corns, and the little monkey can transport 8 at a time. If all of them are transported, how many times is the minimum?
8.In □ γ = 8...6, ○ The lowest is (), and at this time □is ().
Inches □\u 8 = 6...○ χ, χ is (), and at this time □ is ().
9. In □□=□…… 1, the minimum divisor is ().
In □□ =□……… 2, the minimum dividend is ().
10, ○○○○○○○○○○○○○○○○○○○○○○○○○○○96
The number of1,3,5,1,3,5,1,3,5 ..., 19 is ().
1 1, how many different numbers can you make with the three numbers 2, 5 and 8? Please write it down.
12 and 305 have () hundred and 5 ().
985 consists of () ten, nine () and ().
The smallest three digits are (), followed by ().
13 and □
695344
735637
□37 & gt； 645
14,485 There are fewer peach trees, fewer pear trees, fewer apricot trees and more apple trees.
(1) How many apple trees are there? Which answer is the most appropriate?
□470 trees
□490 trees
□800 trees
(2) Among the four kinds of fruit trees, () is the most and () is the least.
15. The length of a wire 1000 meters, using 700 meters. How many meters is left less than used?
16. How many different three digits can you dial on the counter with four beads? Please write it down.
17. After a rope is used for 80 mm, there is 50 cm left. How long is this rope?
18. Choose three numbers from 4, 0, 7 and 9. Three digits is (), and at least three digits is ().
19. The length of a wire 1000 meters, using 700 meters. How many meters are left behind than used?
20. According to the law:
100、90、8 1、73、(? )?
? 1、3、7、 13、(? )、3 1、? 43?
? 1、2、4、7、 1 1、()、22、()