A mention of 6th grade winter vacation homework math

How many storybooks are there?

How many copies are there with storybooks?

How many more storybooks are there than ***?

How many science and technology books are there?

How many storybooks and science books are there? Beg.

The school library has 3,600 books, of which *** accounts for 1/6, story books account for 2/5, and the rest are science and technology books.

1] How many storybooks are there? 】3600 22/5] [*** How many storybooks are there? 3600 [1/6 + 2/5] 3 [How many more storybooks are there than ***?]

3600 [2/5-1/6] 4 [How many science and technology books are there?] 3600 [1-6/1-2/5] 5【How many story books and science books are there?】 3600 [1-1/6].

1 There are several storybooks.

2 *** There are several storybooks.

3 There are a few more storybooks than ***.

4 There are several science and technology books.

5 There are several storybooks and science books.

How many storybooks are there?

How many storybooks and *** are there?

How much is the difference between a storybook and ***?

How many science books are there?

How many storybooks and science books are there?

1 Number of storybooks 2 *** and number of storybooks 3 Number of storybooks more than *** 4 Number of science books 5 Number of storybooks and science books in common.

The number of storybooks.

The number of storybooks plus ***.

1 The number of storybooks 2*** and the number of storybooks 3 How many more storybooks are than *** 4 The number of science books 5 The number of storybooks and science books.

1. There are two layers of a bookshelf, and the number of books on the upper layer is multiple that of the lower layer. If you take 20 copies from the upper layer and put them on the lower layer, there will be the same number of copies on both layers. How many books were there in the upper and lower levels?

Lower layer: (20+20) (Ben.

Upper floor: 80 copies.

2. A rope is 30 meters long, and three-fifths of the meters are used for the first time, and how many meters are used to leave exactly one-half of this rope?

30 2-3 5 = meters.

3. A rope is 8/20 meters long, cut half of it first, and then subtract half of the rest ......After cutting 3 times, how many meters does the remaining part grow?

8 20 1 2 1 2 1 2 = 1 20 meters.

4. A car drove from A to B, and two-fifths of the whole journey took 2 hours, and there were still 20 kilometers to the end point. How many kilometers are A and B apart?

20 (1-2 5) = 100 3 meters.

5. 200 grams of a cup of sugar water, of which sugar accounts for one-twenty-fourth of the water. If you add another 8 grams of sugar, what is the ratio of sugar to water at this time?

Water: 200 (24 25) = 192 grams.

At this time, the ratio of sugar to water: (8+8): 192=1:12

6. Remove the percent sign in a percentage book, and the number obtained is larger than the original, what is the original number?

7. There is a cuboid, cut it into 2 pieces equally, and you get exactly 2 cubes with a side length of 6 cm. At this point, the surface area has increased by a few percent?

8. There is a basket of apples, and there are 80 apples left after taking out 60% of the whole basket, how many apples are there in this basket?

80 (1-60%) = 200.

9. For a piece of cloth, use three-quarters of the meter for the first time, use the remaining three-quarters for the second time, and share 6 meters for the second time. How many meters does this cloth have?

6-3 4) 3 4 + 3 4 = 7 and 3 4 meters.

1.120 books on the top, 80 books on the bottom.

Rice. 1/1 meter.

Kilometer. ：624。。Piece. Rice.

1 The lower layer has x books, and the upper layers have solutions; x=80 A: There are 120 books in the lower layer and 80 books in the upper layer.

2. Set up x meters 30-30x3 5-x=6 solution; x=6 A: Use another 6 meters.

3 (8 20) x (1 2) x (1 2) x (1 2) = 1 20 A; Twentieth of a meter.

4 20 (1-2 5)= A; m5 ( 200 24 + 8) ( 200-200 24) =

(1) Design: There were originally x books on the lower floor. x=80(2)30-(3 5)-30*(1 2)=14 and 2 5 (m) (3) (8 20) 2 2 2 = 1 20 (m) (4) 1-(2 5) = 3 5 20 (3 5) = 100 3 (km).

The number of people boarding at the starting point (the first stop) will be completed at the middle 9 stops and the last stop (10 stops in total). So there were 10 people at the beginning.

In the same way: at the second stop, 9 people get on the train and 1 person gets off.

At the third stop, 8 people got on the bus and 2 got off.

At the ninth stop, 1 person got on the train and 9 people got off.

By the tenth (and last stop), no one got on the train, and the number of 10 people getting off the train and getting on the bus decreased, and the number of people getting off the train increased.

Reach the maximum at the fifth stop.

10+9+8+7+6)-(0+1+2+3+4)=30 (pcs).

The number of people who get on the train at the first starting point (the first stop) will be completed at the middle 9 stops and the last stop (10 stops in total). So there were 10 people at the beginning.

It's the same thing: 9 people get on the train at the second stop, 1 person gets off the train, and by the third stop, 8 people get on the train and 2 people get off.

At the fifteenth (and last stop), no one got on the train, only 10 people got off the train and reached the maximum at the fifth station, so it should be calculated according to the number of people at the fifth station (10 + 9 + 8 + 7 + 6) - (0 + 1 + 2 + 3 + 4) = 30, I think it should be 30.