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Primary School Competition Questions and Answer

2026-10-13 19:31
2026-10-13 23:57

The following are the questions and answers for the third grade of the 10th Cross-Strait Youth (Mathematics) Cultural Exchange Activity in 2021: ** I. The 10th Cross-Strait Youth (Mathematics) Cultural Exchange Activity in 2021, Third Grade First Test Answer ** 1. The answers to the first to fourth questions were 9, 26, 5, 4, and 10 respectively. 2. The answers to the fifth to eighth questions were: 7, 11, 2, 30, 10, 16, B. 3. The answers to questions 9 to 16 were 612, 20, 24, 14, 10, 4, 48, 14, 10, 51, 6, and 32. ** Second, the 2021 Tenth Cross-Strait Youth (Mathematics) Cultural Exchange Activity, Third Grade Second Test Answer ** 1. The topic was to calculate the total construction area of the Century Pavilion and the Renaissance Pavilion. - Answer: [ (45000 - 2000+7000)[div4 + 1]=10000 [m2], the total construction area of Century Pavilion is [1000 + 2000 = 12000][m2], and the total construction area of Renaissance Pavilion is [45000-12000 = 33000][m2]. - [Answer: The total construction area of the Century Pavilion is 12000 square meters, and the total construction area of the Renaissance Pavilion is 33000 square meters.] 2. The question was to calculate the number of sycamore trees and white magnolias. - The solution process: <<500> div10 =<50>>(segment),<<500> parasol tree>(<50 + 1))(trees),<<50> parasol tree>(<50> div10 =<50>)(trees),<(<50> time2 =<100>)(trees), a total of <102+100 = 202>(trees). - Answer: A total of 202 trees. 3. The topic was to calculate the number of dumplings Grandma Wang gave to Nannan and Beibei. - The answer process: <34 - 2><2 - 1>=32>,<32-2 = 30> - Answer: Grandma Wang gave Nannan's family and Beibei's family 30 dumplings each. 4. The topic was to calculate the number of passengers on the high-speed rail. - The answer process was: [6,650 +144+48 = 942](people). - Answer: This high-speed rail can carry a total of 942 people. 5. The question was to calculate the length of two pieces of wood sawed off. - The solution process: <(31 - 10)>=7>(m),<(10 - 7 = 3>)(m). - Answer: Saw off 3 meters of both logs. 6. The topic was to calculate the sales of baby milk powder in June. - The solution process: 160×2 = 320 (cans), 250×2 = 500 (cans), May (320 + 500-620 = 200 (cans), June (500 - 200 = 300 (cans). - Answer: The sales volume in June was 300 cans of baby milk powder. 7. The topic was to calculate the perimeter of the graph. - The solution process: <((6 + 9))(cm). - Answer: 30 centimeters in circumference. 8. The question was to calculate the number of bees on the second fruit tree. - The answer process: <129> div3 = 43>(only),<43+20 - 10 = 53>(only). - Answer: There were 53 bees on the second fruit tree. 9. The question was to calculate the distance between Little Red's house and the teacher's house from the school. - The solution process: <(1500 - 300)>=600>(m),<(600+1500 = 2100>)(m). - Answer: Xiao Hong's house is 600 meters away from the school, and the teacher's house is 2100 meters away from the school. 10. The topic was to calculate the length of the high-speed rail from Fuzhou to Pingtan. - "The solution process: " 2100 'div2 (9 + 1)=210'(kilometer),""(2100 - 1850)'div2 = 125'(kilometer),"" 210-125 = 85 '(kilometer)." - Answer: The high-speed railway from Fuzhou to Pingtan is 85 kilometers long. 11. The topic was to compare the spending of A, B, and C on buying footballs. - Answer process: A cost (40,000,000)(Yuan), you can get the value of <(40+ 4'times3 = 52 ') footballs; B costs (25 - 5 = 20 ),<50 = 1000>()(<50 = 1000>)()( spent <50 = 1250>()(), two 120 yuan can be returned,<(1250-120 - 120 = 1010>()(<)( spent = 1250>)(>)(),& lt A and B spent the same amount and the least, but A got two more footballs, so he chose A. Read more exciting novels for free

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