200 simple calculation questions, don't give too simple. At least three steps, don't do oral calculation

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1. Primary school sixth grade mathematics oral calculation, recursive equation calculation each 100? Urgent~~~
2. Unit of transformation 1 There are two barrels of oil. It is known that 4 / 9 of a is equal to 3 / 7 of B. A is 5kg less than B. how many kg does a and B have? There are two barrels of oil of 275 kg, 5 / 9 of a is poured out, and 4 / 7 of B is poured out. The remaining two barrels of oil are exactly the same?
3. Ask a question about the transformation of unit "1" I don't know how to do it One third of the original students of grade 6 participated in the composition contest, and then five students took the initiative to participate. The actual number of participants was 3 / 5 of the rest. How many people actually participated in the contest?
4. Grade 6 mark application problem group 1 - conversion unit 1 Instead of equation, convert to unit "1" 1, a school planted three species of seedlings this year, of which Wutong tree accounted for 36% of the total, 18 more than pine trees, pine tree is the 3/5 of cedar (3/5), how many schools planted this year? 2. Amateur sports schools have bought three kinds of balls, of which basketball accounts for 13% of the total. The ratio of football to the other two balls is 1:4. There are 134 volleyball balls. How many are there in total
5. How to find the unit "1" in percentage application questions? For example: Xiao Ming used 45 points to climb up the mountain and 30 points to go down the mountain. How much faster is the downhill speed than the uphill speed? What is the unit "1" of this question? How to find the unit "1"?
6. How to find the unit "1" in percentage application questions The original price of a basketball is 64 yuan and the current price is 80 yuan. How much is the current price higher than the original price
7. How to find the unit 1 in the math problem? How to use the unit 1?
8. How to find a unit in the application questions?
9. Unit "1" in practical questions“ The teacher didn't teach how to determine the unit "1" in math class, so he had to ask on the Internet. Please give me some advice A is 1 / 2 more than B“ A is 1 / 3 of B (unit 1)“ B is 3 / 2 less than a“
10. Make up a practical problem of percentage, a practical problem of unit "1" and a practical problem of normalization
11. Who can give me a sixth grade mental arithmetic problem of 1000? It's better to separate the problem and the answer, so it's easy to do, and I'll hand in my homework tomorrow, I'll hand in my homework tomorrow. Maybe I won't have any,
12. Sixth grade volume I oral arithmetic card answers
13. 1/4*4—1= （2/5+3/5）*14= 2/5*14+3/5*14= （1/19—2/9）*5= 3/8*7*8/3= 1/2*1/3*12= 45/*1/4*5/6= 7/6-1/8-7/8= 1/4*1/4÷1/4= 4/3+2/5-2/5= 5/7÷5/3*7/3= 1/3÷3/4*4/3= 5/8*7/10*8/7= 3/4÷2/3÷3/4= 3/4+1/7+7/4=
14. Sixth grade mental arithmetic, calculation
15. Seek 20 oral arithmetic at the level of sixth grade (with answers) It's going to be with scores
16. Who has the oral arithmetic problem of decimal multiplication and division?
17. Simple calculation of decimals 15×11.1÷37.5÷37 It's the process that matters
18. Mathematics fifth grade decimal addition and subtraction multiplication and division mixed simple solution 2.36 except [2-0.08 × (2.08 + 8.32 + 250 × 0.04)] The top one is off It's all simple 4.65×7.6+3.4×4.65-4.65 3.4×4.3+3.7×3.4+3.4 3q, SF answer is very good, is the first question Please
19. Simple calculation of fifth grade decimals 20, not integers, fractions. Just decimals,
20. 1、1/0.1/0.01/0.001/．．．/0.00000000001 2、2005+200.5+20.05+2.005 3、（9991*1999.1999+9991.9991*1999）/2.0002 4、〔2.4*?+（56/7-1/0.25）〕*6.5＝104 5、（1+1.2）+（2+1.2*2）+（3+1.2*3）+．．．+（100+1.2*100） The faster the better! Can calculate a problem is a problem! KKKKKKKKKKKKKKKKK!