1. A batch of goods can be transported by trucks with a load of 8 tons 15 times. If it is changed to a truck with a load of 12 tons, it can be transported by (10).
2. The playground of Xingmin Primary School is120m long and 50m wide. Later, the length and width increased by 40 meters and 25 respectively.
rice. Now the area of the playground has increased by (6000) square meters.
3. Fill in brackets with "possible", "impossible" or "certain".
One angle of a triangle is an acute angle, which (may) be an acute triangle; An angle is a right angle, which (must) be a right triangle; There is an obtuse angle, which is (impossible) a right triangle.
4. The following two sets of numbers are the numbers on four cards in the game of playing 2 1 point. Please choose ten,-,×, ⊙, () to form an equation. 6、8、8、9 8×9-6×8=24 2、2、5、7 2×5+2×7 =24
5. Bend a 20 cm long copper wire into a rectangle with an integer side length. There is more than one such rectangle. Among them, the smallest is 9 cm long and 1 cm wide; The largest area is 5 cm long and 5 cm wide.
6. The three internal angles of a triangle are not less than 60, and this triangle must be an (equilateral) triangle; In a triangle, the degree of one internal angle is equal to twice the sum of the other two internal angles. This triangle must be an (obtuse) triangle.
7. The average score of math contest A, B and C is 89. After adding Ding, the average score of four people is 2 points higher than that of A, B and C, and Ding's score in the math contest is (97).
8. The teacher is 45 years old. He has three students. Xiaoming 15 years old, Xiaohong 1 1 years old, and Liang Xiao is 7 years old. This will take (6) years. The teacher's age is equal to the sum of the ages of their three students.
9. The sum of the minuend, subtree and difference of a subtraction formula is 456, and the difference is three times that of subtree, so the subtraction formula is: 228-57 = 17 1.
10, Xiao Qiang, Xiaoqing, Xiaoling and Xiaohong, Xiao Qiang is not the shortest, Xiaohong is not the tallest, but it is taller than Xiao Qiang, and Xiaoling is not taller than others. Excuse me: among the four people, (Xiaoqing) is the tallest and (Xiaoling) is the shortest.
★ 1 1, Wang Li, Yu Bing and Zhao Hong * * * have 74 pieces of sugar, and Wang Li's sugar is three times that of Yu Bing. Zhao Hong is the least, the number of blocks with sugar is double digits, and one bit is not 0. Zhao Hongyou has (14) candy.
★ 12, a three-digit number, the sum of the numbers on each digit is 15, and the number on the 100th digit is 5 less than the number on the single digit; If the unit and the hundred digits are reversed, the new number is 39 times less than the original number. Then the original three digits are (267).
Second, answer the question.
1. A factory uses coal 120 tons in the first half of the year and coal 102 tons in the second half of the year. According to the 80 yuan per ton of coal, how much is the monthly coal consumption saved in the second half of the year compared with that in the first half?
Savings = 80 * (120-102) ÷ 6 = 240 yuan.
2.A, B, C and D ranked differently before the skipping competition. A said: A is second, D is third. B said: A is the first and D is the second. C said: C is second, D is fourth. In fact, the above three statements are half right. Where are a, b, c and d?
first time
Third, second
Ding III
Second, fourth
3. As shown in the figure, if the shaded part is square, what is the circumference of the largest rectangle?
No picture, no truth.
★4. Xiao Lin and Lu Xiao play the game of "100". The rules of the game are as follows: two people take turns to count from 1, and each person counts at least 1 and at most 5. Whoever reports "100" first wins. Excuse me: If Kobayashi reports first, how can he be guaranteed to win? Write down all the figures he wants to quote.
First report