Fourth grade volume I off type calculation questions, Also don't be too simple. Such as 1 + 1 + 1 is equal to several!
25-5+2
30x2+1
80x1-10
25x4+100
300+20+10
88+22+100
33+77+20
44+66+20
33+77+80
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- 1. The calculation of the calculation (as a reminder: some of you can simply calculate) 4000-3456 (as some of you can, some of you can simply calculate) 4000-3456 (as some of you can, some of you can simply calculate) 4000-34556 \65; (nbsp & nbsp; & & nbsp; & nbsp; & & nbsp; & & nbsp & nbsp; & & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp; & & nbsp & nbsp & nbsp; & & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp; & & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp; & & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp; & & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp; & & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp; & & nbsp & nbsp & nbsp & nbsp & nbsp 1
- 2. Fourth grade volume I simple calculation, off type calculation! Winter vacation is coming. There are many problems to be solved, especially simple calculation and off formula calculation,
- 3. Math problems and answers in grade four of primary school A rectangle has an area of 256 square centimeters. Now, shorten its length by 4 times and increase its width by 4 times to form a square. How long is the side of the square? Thank you. It's a process
- 4. There are 47 children. The teacher should give each of them one red pen and one blue pen. In the store, each pen is 5 pens in a bag or 3 pens in a bag. It is not allowed to open the bag for retail. The red pen of 5 pens in a bag is 61 yuan, the blue pen is 70 yuan, the red pen of 3 pens in a bag is 40 yuan, and the blue pen is 47 yuan. The teacher needs at least 50 yuan to buy the pens
- 5. 8.06=____ ×10+____ ×0.1+_____ ×0.01 8.06=____ ×10+____ ×1+____ ×0.1+_____ ×0.01
- 6. Primary school mathematics, very simple, help 1. It's a slope road from land a to land B. a truck travels 30 kilometers per hour uphill and 40 kilometers per hour downhill. It takes 7 hours to go back and forth. How many kilometers are there between the two places 2. A car runs 120 kilometers in 2.5 hours and runs from a to B for 6 hours at the same speed. If Xiaoguang rides a bicycle from B to a while the car starts from a, the speed and the speed of the car are 1:4. How long does it take for Qiu Xiaoguang and the car to meet? Team a and team B are digging a 620 meter long canal. Team a is digging 3 / 4 of the canal equal to team B's 4 / 5. How many meters more is team a digging than team B?
- 7. A batch of 202 heavy goods are transported by two kinds of vehicles with a load of 6 tons and 8 tons at one time. It is known that there is one more vehicle with a load of 6 tons than that with a load of 8 tons. How many vehicles are needed for each of the two kinds of vehicles? It has been calculated that there will be 15 vehicles with a load of 6 tons and 14 vehicles with a load of 8 tons. I want to say How to make a formula?
- 8. Two super difficult math problems in grade four, please! Practical questions
- 9. 1. Xiaohu walked 1 / 5km in 6 minutes, how many kilometers per minute on average? 2. An engineering team has built a road, which is 2 / 5 of the total length in 6 days. How many parts of the total length can be built every day? According to this calculation, how many parts of the total length can be built in 10 days? (Note: 1 / 5 = 1 / 5)
- 10. The formula calculation of two mathematical problems 1. The tallest animal in the world is giraffe. A giraffe is 5 meters tall, 2 / 3 higher than an elephant. How many meters is this elephant tall? 2. Dolphins can swim 70 kilometers per hour, 1 / 6 faster than southern whales. How many kilometers can Southern whales swim per hour?
- 11. Give me 100 times off the formula, It's not the same. It's not the same type. But it's better to make it easy to calculate. Please note again,
- 12. Fourth grade primary school recursive equation calculation (can skillfully calculate to skillfully calculate) urgent! Tell me if I can do it skillfully. If I can, do it skillfully. If I can't, leave it alone 99×199+99+199 67×9+99×3 (632×5+632×2+632)×125
- 13. How to calculate 76 + 85-14 × 8,
- 14. What is disjunction calculation
- 15. In a division formula, the decimal point of the divisor moves one place to the right, and the decimal point of the divisor moves one place to the left
- 16. When Xiao Ming calculates a division, he leaves out the decimal point of a two decimal place. The quotient of 1.5 divided by this number is 130. What are the divisor quotients in the correct formula?
- 17. How to use the simple method to calculate the math problem 135x99 in Volume 2 of grade 4
- 18. A few mathematical problems (four mixed operations) can be simple to simple! 1、3-1/3-1/3÷3 2、15/16+(7/16-1/4)÷1/2 3、1/5÷[(2/3+1/5)*1/13] Urgent ah ah! Can be simple to calculate! To have a process, recursive equation
- 19. Mathematical problem "four mixed operations of fractional multiplication" What can be calculated simply should be calculated simply (1 / 2 minus 1 / 3 plus 1 / 4 minus 1 / 5 plus 1 / 6 minus 1 / 7) x210
- 20. Why introduce positive and negative numbers? Please give an example