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Who has the exercises of the fourth grade mathematics volume I of PEP
One calculator is 24 yuan. Mr. Li wants to buy four. He has 100 yuan with him. Is it enough?
2. An elephant in the park has to eat 350 kg of food a day. The keeper has prepared 5 tons of food. Is it enough for an elephant to eat for 20 days?
3. The school should add two kinds of new books to the library, one is "children's Encyclopedia", each set is 125 yuan, the other is "mathematical guess", each set is 18 yuan, each set is 3 sets, how much is the total?
4. Large size sportswear is 145 yuan per set, small size sportswear is 128 yuan per set, buy 34 sets of large size sportswear and 25 sets of small size sportswear
(1) How much do you pay for each of the two sportswear?
(2) How much will it cost altogether?
5. The school needs to add 44 sets of desks and chairs, 128 yuan for each desk and 17 yuan for each chair. How much does it cost altogether?
6. Each sapling is 16 yuan. Buy 3 saplings and get one free. Buy 3 saplings at a time. How much cheaper is each sapling?
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- 6. Who can help me solve a math problem Tongle toy factory produced a batch of children's toys. In the first week, it completed 25% of the toys, in the second week, it completed 30% of the toys, and in the second week, it produced 450 more toys than in the first week. How many toys are there in total?
- 7. The original price of a washing machine is 1350 yuan, and now it is sold at a 20% price reduction. At this time, the price is 19 yuan more than the cost. How much is the cost price of this washing machine?
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- 10. 2008 power of 2006x1 - 2008x1 + 2009 =? Why 2007!
- 11. Dividing by a number (except 0) is equal to multiplying by the reciprocal of the number______ &Nbsp; (judge right or wrong)
- 12. Answer and explanation of question 8 on page 37 of mathematics book of Tianjin primary school fifth grade people's Education Press There is no wonder in the world. Alas~~~
- 13. First simplify and then evaluate 1A / 2 minus (2a minus the square of 2B / 3), where a is negative and 1B / 2 equals 1
- 14. A ^ 2 + 4ac + 3C ^ 2-3ab-7bc + 2B ^ 2 factorization time
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- 16. Given A-B = 4, ab = - 1, find the value of formula a + 3ab-b
- 17. The square of a - 3AB + 9b, where a = - 2, B = two-thirds of the value is
- 18. The square of a - AB = 3, the square of 4ab-3b = - 2, then the square of a + the square of 3ab-3b is
- 19. If x = 1, the value of cube + 3bx + 4 of algebraic formula 2aX is 5, then what is the value of cube + 3bx + 4 of algebraic formula 2aX when x = - 1?
- 20. When the fractional equation 2XX − 1 − 5x − 5x + 3 = 0 is solved by the substitution method, if XX − 1 = y, then the original equation can be reduced to () A. 2y2+3y-5=0B. 2y2-5y+3=0C. y2+3y-5=0D. y2-5y+3=0