小学数学总复习经典好题解析(解答题)（Primary school mathematics review, classic good question analysis (answer questions)）.docVIP

小学数学总复习经典好题解析(解答题)（Primary school mathematics review, classic good question analysis (answer questions)） Elementary school mathematics, review, classic, good question analysis Answer questions 1, a, B, two road repair team at the same time repair a 1875 meter highway, with 25 days. Team B team completed repair than 125 meters, the B team average daily repair 35 meters, the average daily repair team how many meters? Resolution 1: With (full length meters - repair team B the total number of metres), a number of meters every day to repair 25=. The 125 meters in the question are superfluous. Column formula: (1875-35 * 25), 25=40 (m) Resolution 2: With team B average daily number of meters + repair team B Bijia team daily repair team daily repair meters number = the number of meters, total length of 1875 meters in the known as the surplus condition. Column: 35+125 / 25=40 formula (m) 2, express from a station at the B station 8 hours, arrive at a local station 12 hours from B station, if the fast and slow two vehicles at the same time from a and B two station is relatively open, more than the local express meet is 180 km, a and B two station meet many kilometers? Resolution 1: From the known conditions shows that the fast speed is 1/8, the slow speed is 1/12, first calculate the encounter time, then meet the express than the local multi line total length of a few, and finally the relative amounts of division, get full length. Formulation: 1 / (1/8+1/12) =24/5 (hours) (1/8-1/12) * 24/5=1/5 180 / 1/5=900 (km) Resolution 2: It can also be solved by the method of ratio distribution 1/8:1/12=3:2 3+2=5 180 / (3/5-2/5) =900 (km) 3, the film tickets 20 yuan a, after the price doubled the audience, income increased by 1/5, then how much a ticket price? Analysis: At first glance, this question seems to be lacking in the number of spectators. Through analysis, it is found that the number of viewers actually has nothing to do with the answer. Since there is a multiple relationship b