Third-grade mathematical thinking training method 1, master the general method of enumeration, learn to enumerate regularly in a certain order, and achieve "no emphasis or omission"; Apply dictionary arrangement method to solve integer analysis problems, and learn to distinguish between "counting order" and "out of order"
2. On the basis of understanding the meaning and nature of numbers, master the calculation of application part skillfully. Through further study and expansion of the concept. Children's thinking training has been significantly improved. At the same time, it also improves students' interest and enthusiasm in learning. Established confidence in learning mathematics well.
The sum of 1, a, b and c is 150, the number of a is 48, and the number of b is the same as that of c, so what is the number of b?
2. Students do exercises and form a square team. From front, back, left and right, Xiaohong is the fifth. How many people are there?
3. Party A and Party B buy the same magazine. Party A buys a magazine with a price difference of 80 points in 2 yuan and 60 points in 2 yuan, and their money adds up to just one magazine. So what's the price of each magazine?
In a math test, 30 of the 36 students in the class answered the first question correctly, 25 answered the second question correctly, and everyone answered at least one question correctly. How many people answered both questions correctly?
5. A train departs from A to B at 5: 00 in the morning, with a speed of120km, and arrives at B at 3: 00pm. How many kilometers is it between A and B?
There are 24 volleyballs in the school, and the number of football is five times less than that of volleyball. How many volleyball and football are there in the school?
7. The bus leaves at 7 a.m. and runs every 5 minutes. How many buses leave at 7: 30? (Drawing, Analysis and Calculation)
8. When calculating a problem, Xiaohua mistook a number plus 4 times 2 for a number times 2 plus 4, and the result was 40. What is the correct result?
9. A tree planting team planted trees. If each person plants 5 trees, there will be 14 trees left; If there are seven trees for each race, there will be four fewer trees. How many people are there in this tree planting group? How many trees are there?
10, the number of girls in the school choir is four times that of boys, and there are 36 more girls than boys. How many boys and girls are there in the choir?