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2. Age of trees: There are three trees in the park, and their age is composed of two different numbers of 1, 2, 3, 4, 5, 6, one of which is exactly half the age of the other two trees. Do you know how old these three trees are?
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3. Parity problem
① Divide 10 balls into three groups, and the number of balls in each group is required to be odd. How to divide it?
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② Give three children 1 1 apple, and ask each child to get an even number of apples. How to divide it?
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4. Spring outing 45 children lined up for a spring outing. From the front, Xiao Gang is19; From the tail, Xiao Li is 12. How many people are there between Xiao Gang and Xiao Li?
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5. Count off. Line up to count off. I will count to seven when I count off and nine when I count down. How many children are there?
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6. Children line up. Xiaohong has four people in front and three in the back. How many people are there in this team?
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7. Number of teachers took several children to the movies and bought tickets for 1 1. How many children go to the movies with the teacher?
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8. Equation
Fill in 2, 3, 4 and 5 in () respectively, and each number can only be used once.
( )+( )-( )=( )
9. Queue: Children line up. Xiaoping has four people on his left and eight people on his right. How many people are there in this line?
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10. Time: Four young people played poker together for 40 minutes. How long did each of them play?
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1 1. Send a painting: Grandpa has a famous painting, which is rolled into 1 10 pear and bamboo. I want to send it to my uncle who is far away, but the post office only allows items with a length of less than one meter. Can you find a way to send this famous painting there?
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12. Rabbit: In order to clean the rabbit cage, someone put four live rabbits and four tigers in a cage. After cleaning two rabbit cages, he wants to put them back. How many live rabbits are there at this time?
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13. Qiaosuan
1+17+26+35+24+13+25+29 = answer.