Who has more than 50 questions each in the third and fourth grade Olympiad

Go to Xinhua Bookstore to buy a copy of the Olympiad materials.

I don't know what type of math Olympiad questions you want, look for them yourself.

Grade 5 Mathematics Olympiad.

Solution: Original = 765 27 (213 + 327) = 765 27 540 = 765 20 = 15300

Solution: Original = (9999-999).

9000+9000+……9000 (500 9000).

Solution: (19981998+1) 19991998-19981998 19991999

Solution: 873 477-198 = 476 874 199

Hence the original formula = 1

Solution: Original 1999 (2000 1998) 1997 (1998 1996) ....

Solution: (209+297)*23 2=5819

7 Calculation: Solution: Original formula = (3 2) * (4 3) * (5 4) *....100/99)*(1/2)*(2/3)*(3/4)*…98/99)

1. The average age of Xiaoling and her father is 39 years old, and her father is 26 years older than her, so Xiaoling is old.

2. A and B walked a total of 360 meters in 3 minutes, and A walked 26 meters more per minute than B, so A walked 26 meters per minute.

3. The sum of the two numbers of A and B is 100, and the sum is 5 times the difference, if A is larger than B, then A is.

4. The difference between the numbers of A and B is 100, and the sum is 5 times the difference, if A is larger than B, then A is .

5. The two brothers have a total deposit of 260 yuan. If the elder brother gives the younger brother 15 yuan, then they have equal savings. My brother's original deposit was yuan.

6. Xiaohu and his father are 63 years old, and his father is 33 years older than Xiaohu, and Xiaohu was 6 years old 6 years ago.

7. My brother is 18 years old this year, my sister is 15 years old, and when the two are 67 years old, my brother is old.

8. A and B two baskets of apples weigh a total of 30 kilograms, take out 8 kilograms from a basket and put them into the B basket, then the B basket is 10 kg more than the A basket, and there are apple kilograms in the original A basket.

9. The sum of the subtracted, subtracted, and poor is 40, and the subtracted is .

10. When my sister was 8 years old, my sister was born. In 2002, the sisters were 44 years old and 200

1. Xiao Ming's average score in the 4 math tests was 89 points, and the 5th test scored 94 points.

2. Last semester, Wang Hong's average score in three subjects of Chinese, mathematics and foreign language was 94 points, of which the average score of Chinese and mathematics was 92 points

3. There are 18 grandmothers in the nursing home, with an average age of 75 years old, and 12 grandfathers, with an average age of 70 years old

4. The zoo originally had 5 lions, their average age was 13 years old, last weekend, the zoo brought two more lions, one of which is 5 years old, the other 14 years old, at this time the average age of the lions in the zoo is how old?

5. Master Wang made 24 parts on the first day, 15 parts in the morning and 17 parts in the afternoon on the second day

6. There are three numbers A, B and C, the sum of A and B is 90, the sum of A and C is 82, and the sum of B and C is 86

7. Master Wang took a boat to the opposite shore, went to the headwind of 5 kilometers per hour, took 6 hours, and came back with a tailwind, it took 4 hours, and asked Master Wang what is the average speed of the round-trip

8. Taxi driver Master Liu earned an average of 130 yuan per day in the first three days of last week, and a total of 450 yuan in the last four days

9. If the average of five numbers is 20, if one of the numbers is changed to 15, then the average of the five numbers is 18, what is the original number that has been changed?

10. The average of the three numbers of the subtraction, the subtraction and the difference is 16, of which the difference is 15, and the subtraction and the subtraction are more respectively.

There are x boys and y girls.

x+y=1000

x 2 (9 + 5) + y 2 (8 + 6) = 7000 This is not that I don't give the equation, but there must be two unknowns.

The use of equations also inevitably requires a dry draft, and an unknown number should be set, that is, y is represented by x.

y=1000-x

The books donated are:

x contains mu 2 (9 + 5) + (1000-x) 2 (8 + 6) = 7000 (x will cancel each other out).

Good luck with your studies!

This question can't be answered, and the answer upstairs is good.