First of all, fill in with your heart. (per space 1 point, *** 10 point)
1, at least () small squares can be used to make a larger square.
2. Fill in the number according to the law: 505458 ().
The following are the ages of four people in Xiaohua's family. Please fill it out. (***2 points)
My mother is 47 years old, my father is 50 years old, Xiaohua 12 years old and my brother is 8 years old.
(1) () is earlier than ().
(2) () is much younger than ().
4. The ten digits of a two-digit number are 3, which is 2 less than the single digit. This two-digit number is ().
5. Use your head to calculate: 1+2+3+4+5+6+7+8+9= ().
6, a two-digit number, with ten digits greater than 8 and single digits less than 1. This two-digit number is ().
7. 1 yuan can buy two exercise books, and 5 yuan can buy () exercise books.
8. The difference is 70, the subtraction is 8, and the minuend is ().
9. A story book has 79 pages. Xiaohong has read it for 9 days, and there are 8 pages left. Xiaohong read page ().
Second, choose carefully (* *10)
1、50+()& lt； 64. The maximum value in brackets can be filled in ().
①、 12②、 13③、 14
Xiaogang raised 42 chickens and sold 8. Please select an appropriate question ().
How many chickens are there in Xiao Ming's family?
(2) How many chickens were sold? (3) How many chickens are left?
3, a two-digit number, greater than 50, the unit is not 5, this number is ().
①、45②、55③、56
4. Among the following figures, the number closest to 80 is ().
①、75②、78③、83
5, the following statement is wrong ().
① There are 10 tens in100.
② The two 5s in 55 have the same meaning.
There were 99 1 in 1999.
Third, calculate carefully. (Question 3, 8 points, ***4 1 point)
1. Look who got it right. (the first seven questions 1, the last seven questions 2, ***2 1).
6+7= 18-9= 14-8=54-4=
75-70=6+80=39+2=
25+60=42+3=46-3=60-5=
12-5+8= 16-7+4=32-3=
2. Fill in the appropriate number in () (2 points for each question, *** 12 points).
( )+ 10=4554-( )=4( )-8=60
15-( )=930+7=( )+3440+( )=( )+8
3. Cong Cong chose two numbers in 10 and calculated that their sum was 76.
23 40 52 68 53 48 8 36 39 28
Cong Cong's choice of two numbers may be:
And, and, and, and.
Fourth, solve the problem. (5 points for each small question, ***20 points)
1. Xiao Qiang 25, 5 less than Kobayashi, and Kobayashi more than Xiaogang 10. How many pictures does Xiaogang have?
Grandma Liu raised 36 chickens and 6 ducks, and later bought 3 chickens and 3 ducks. How many more chickens does Grandma Liu add than ducks now?
3. A pencil-box 9 yuan and a dictionary 15 yuan. My mother only brought 20 yuan. How much does it cost to buy these two school tools?
4. Complete and answer the following application questions.
The original 65 sweets, how many sweets are left?
Five, find the method (19 points)
1. These are some figures drawn from 100 tables. Please fill in the numbers in the blanks according to the order and rules of 100 tables (***7 points).
2. Draw ○(6 points) in the blank according to the rules.
○○○
○○○○○
○○○
○○○○○○
○○○
3. Write the formula according to the law. (***6 points)
1 33=33× 1=3
Two 3+3 = 63× 2 = 6
Three 33+3+3=93×3=9
Six threes