Elementary School Mathematics 1 Volume 8 Unit 2 Examination Paper (A). Fill in the blanks (1- 12, 2 points each, 13- 14, 3 points each, 15- 16, 4 points each, 17. *** 44 points) 1. The laws of addition and association are expressed in letters: 2. Additive commutative law is represented by letters: 3. The number 1 greater than 699999 is (). 4. Multiplicative commutative laws are expressed in letters: 5. Contrast size: 240×15× 240×10× 56. Contrast size: 28-28× 0 □ (28-28) × 07. Compare sizes. (45+25) × 6× 45× 6+258. The law of multiplicative association is expressed in letters: 9. Compare sizes. 96-(54+26) □ 96-26-54 10. Comparative size. 60× 4× 2× 25× 60× 2× (4× 25).11. 27× 13+27× 27 □ (13+27 )× 2712.13870000 kg = () 10,000 kg13. The multiplication and division method is expressed by letters:14.1195000000 people ≈ () 100 million people 15.200760. It is pronounced as: (), and the mantissa after omitting hundreds of millions of digits is about: ().16. The largest six digits are (), the smallest six digits are (), and their sum is (). The difference is (). Second, simple calculation (3 points for each item *** 2 1 minute)1.563+296 = 2.1001× 783.4500 ÷ 254.1. What is the sum of the quotient of divisors 2.2520 and 30 plus the product of 12 and 75? V. Application questions (6 points for each small question * * 1 2 points)1. A factory originally planned to produce 4,800 farm tools a year, and actually completed the task in 10 month. How much more farm tools are actually produced each month than originally planned? A machine can process 320 parts in 8 hours. According to this calculation, how many hours does it take to process 2000 parts with five machines? Elementary School Mathematics Volume VIII (B) 1 Unit 2 Examination Paper. True or false (2 points for each small question * * 16 points) 1. Divide 0 by any number and you will get 0 ()2. 758+396=758+400-4 ().3.596-98=596-98-2 ( ) 4.72×(38+42)=72×38+42 ( )5.900÷700=9÷7= 1……2 ( ) 6. 1456-(324+456) = 1456-456-324 () 7.54 ÷ (3+6) = 54 ÷ 3+54 ÷ 6 () 8. Because A-8=B-6, A > B () 2. Fill in the blanks (the fifth item in 657 is 10, and the sixth item is 16, * * 36) 1. Rewrite formula 9+9+9+9+9 into multiplication formula: 2. In the billions and millions of digits of a number, the decimal digits and digits are all 6, and the rest are all 6. Write this number: () .3. Write a+4+a+4+a+4 as a product: .4.40650 tons as: (), and the mantissa after omitting hundreds of millions is about (). The largest three digits are (), the smallest five digits are (), and their sum is (). The product is () 6.5245036 is () digits, the leftmost "5" is () digits, and its counting unit is (), which means five (). The other "5" is () digits, and its counting unit is (). It means five (). The values represented by two "5" are different (). Third, simple calculation (4 points for each small question * * 24 points)1.3675-29982.2365-(307+365) 3. (7× 8765438+...154.45× 99+455. (343+685+157)-5856.396× 25 IV. Application questions (6 points for each small question *** 24 points) 1. A coal mine is planned to be mined in April. (calculated by 30 days) 2. There are 6 people in the first group, and the average score of 5 people in the language test is 85. After adding Wang Gang's score, the average score is 87. What's Wang Gang's exam score? 3. Two water pipes simultaneously release water into the pool. The discharge of the thick pipe is15t per hour, and that of the thin pipe is 1 1 ton per hour. How many tons of water can this pool hold in eight hours? (Calculated in two different ways) 4. The rectangular playground is 50 meters long and 40 meters wide. After the expansion, the length and width increased by 5 meters respectively. How many square meters has the playground area increased after the expansion?