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 law of additive association is expressed by letters: 2. Additive commutative law is represented by letters: 3. 1 The number greater than 69999 is (). 4. Multiplicative commutative laws are expressed in letters: 5. Contrast size: 240×15× 240× 65448. ×0 7. Compare sizes. (45 25 )× 6× 45× 6 25 8. The law of multiplicative association is expressed by letters: 9. Compare sizes. 96-(54 26) □ 96-26-54 65 438+00. Comparative size. 60× 4× 2× 25× 60×11. 27× 13 27 □( 13 27)×27 12. 13870000kg =() 10000kg 13。 Law of multiplication and distribution. 100 million people 15.745200760 is pronounced as: (), and the mantissa after omitting hundreds of millions of digits is about: (). 16. Writing: (), rounded to 10,000 digits is about () 17. The largest six digits are (), and the smallest is. The difference is (). Second, simple calculation (3 points for each item ***2 1 minute)1.563 296 = 2.1001× 78 3.4500 ÷ 25 4.125. 1. 156-x = 78 2 . x 72 = 146 3 . x× 1 = 12 1 4.750÷x = 30 5.408×(。 1. The dividend is 432, the quotient is 13, and the remainder is 16. Divider. What is the sum of the quotient of 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 5 machines? Unit 2 Test Paper (B) of Volume 8 of Primary Mathematics I. True or false questions (2 points for each small question * * 16 points) 1.0 divided by any number will get 0 () 2.758 396 = 758 400-4 () 3.596-98 = 596-98-. 5.900 ÷ 700 = 9 ÷ 7 = 1 ... 2 () 6.1456-(324456) =1456-324 () 7.54 ÷ (36) Rewrite formula 9999 into multiplication formula: 2. On the billions and millions of digits of a number, the tens and single digits are all 6, and the rest are all 0. Write this number: () .3. Write a 4 a 4 a 4 in the form of: .4.3040650 tons as the mantissa after the product is: (), omitting 1 100 million bits. 5. The largest three digits are (), the smallest five digits are (), their sum is (), their difference is (), and their product is (). It means 5 (). The other "5" is at the () position, and its counting unit is (). It means five (). The values represented by two "5" are different (). Iii. Simple calculation questions (4 points for each small question * * 24 points)1.3675-1998 2.2365-(307 365) 3. (7× 87 15 3× -585 6.396×25 iv. Application questions (6 points for each small question ***24 points) 1. A coal mine plans to produce 38,400 tons of coal in April. After technical transformation, the average daily output increased by 256 tons compared with the original plan. How many tons of coal was actually produced 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?