6th grade Oral Arithmetic 530 Oral Arithmetic 215 Thanks

Oral arithmetic problems.

Calculation questions. I don't have time to come out with much, so that's all.

If you are a teacher, why are you so lazy?

6.4 7 5 9 + 3 7 5 Fan Zhao 9

1.Oral arithmetic is carefully discussed in the following questions.

2.Fill in the order of operations for the following questions, and then calculate the number.

3.Judgment: "Hit the right" and "Hit the wrong".

1) 13 15 has the same meaning as 15 13. (

2) The result of 3000 425 8 must be less than the result of 3000 (425 8). (

3) The product of the two factors is 800, if one factor does not change and the other factor shrinks by 20 times, then the product is 40. (

4) Calculation formula: "750 25+35 2" means that the meaning is the quotient of 750 divided by 25; Plus 35 times 2 times, and how much? (

4.Calculate in an easy way:

5.Calculate the following questions:

6.Answer with a comprehensive equation:

1) What is the quotient of 42 minus 28 divided by 14?

2) 840 minus 480 divided by 240 quotient, plus 162, and what is the sum?

3) What is the product of 258 plus 42 and multiplied by 185 minus 158?

4) What is the quotient of 1080 minus the product of 6 and 12 and divided by 12?

5) Subtract the product of 60 and 80 from 6000, and divide the difference by 120, what is the quotient?

And 20 how much more is the product of three numbers than their sum?

7.Application:

1) The school bought a total of 12 sets of desks and chairs, a table is 75 yuan, and a chair is 55 yuan.

2) The fruit store brought 24 baskets of apples and 36 baskets of pears, and each basket of apples and pears weighed 32 kilograms, how many kilograms of apples and pears were transported?

3) From A to B, it is possible to travel 75 kilometers per hour by train and arrive in 30 hours, if it only takes 2 hours by plane, how many kilometers can be traveled per hour on average by plane?

4) There are 1,200 bikes in the store, and 524 were sold in May, 148 more than in June, how many are left?

5) There is a rectangular vegetable patch, 32 meters long, the area is 768 square meters, how many meters is the width of the vegetable patch?

6) The road repair team repairs a road, and plans to repair 45 meters per day, which will take 40 days to complete. Later, the construction method was improved, and it was possible to repair an additional 20 meters per day, but now how many days does it take to complete the task?

973×5×2 125×897×8 2×125×8×5

34×7+65×7+7 38×38+38×62 1.After A does a job for 6 hours alone, B does it for 4 hours, and after A does it for 2 hours, how many hours does it take for A and B to complete the task?

1-2 6) (1 6+1 4) = hours.

2.An engineering team built a road. On the first day, 38 meters were repaired, and on the second day, 42 meters were repaired. The second day was more repaired than the first day was 1 28 of the road. How many meters is the length of this road?

42-38) (1 28) = 112 m.

3.The mall sells two coats, and the selling price is 150 yuan, but according to the cost, one makes a quarter {1 4}, and the other loses 1 4. Explain why.

If you lose, you can earn 1 4 is the original price, 1 4 is 150-150 (1 + 1 4) = 150-120 = 30 yuan, and 1 4 is 150 (1-1 4) = 200 yuan, and 1 4 is 50 yuan.

4.Guangming Chicken Farm sells a batch of broilers, the first time sells 2 5 of the total number of broilers, the second time sells 1 3 of the total number of broilers, there are 1200 broilers left, how many broilers are there in the chicken farm?

1200 (1-2 5-1 3) = 4500 pcs.

5.The school has a rectangular flower bed with a circumference of 800 meters and a ratio of length to width of 5:3.

800*5 16=250 meters.

800*3 16=150 meters.

6.How many meters is the area of the cross-section of a decimeter-long rope around a tree?

The square of meters = 314 square meters.

7.Use 24 meters of colored silk to make colored flags, an average of 1 6 meters of colored silk for each small flag, 3 4 of these colored flags are used to decorate both sides of the exhibition hall door, how many colored flags are there on both sides of the decorative display gate?

24 (1 6)*3 4=108 faces.