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[black rabbit] y white rabbit] 8 more than black rabbit] refers to y rabbit] refers to 8 more than black rabbit
8 / 2 + 8 = 12
The edge length ratio of the two cubes is 3:4, and the volume ratio is ()
The perimeter ratio of the two circles is 5:3, the radius ratio is (), the diameter ratio is (), and the area ratio is ()
The edge length of a cube is 5cm. The ratio of its surface area to its bottom area is (), and the ratio is ()
The number a is 1.5 times the number B, and the simple integer ratio is ()
The number of a is 2 / 5 less than that of B. the ratio of B to a is () and the ratio is ()
The ratio of 3 / 8 to its reciprocal is ()
The total length of a cuboid is 48 cm, the ratio of its length, width and height is 3:2:1, and its volume is () cubic cm
There are two granaries A and B. three quarters of the grain in a granary is far away, and two fifths of the grain in B granary is carried away. The weight of the remaining grain is equal
The speed ratio of a car to B is 9:8. It takes 3 hours to return
The ratio of books on a and B shelves is 2:5. After 360 more books on a shelf, the ratio of books on a and B shelves is 5:8. There are () books on these two shelves
1/30+1/42+1/56+1/72+1/90
27:64 (volume ratio is the cube of edge length ratio);
5：3；5:3；25：9；
6:1；6:1；
3:2；
3:5；3:5；
9:64；
48；
12:5；
24:17；
2600；
1；
That's it!
Pour 408.2 liters of water into a and B cylindrical buckets, so that the water surface in the bucket is the same high (water does not overflow). The bottom radius of the two buckets are 2DM and 1dm respectively. What's the depth of water in the bucket? DM [DM equals decimeter] any algorithm is OK, but it must be learned from the sixth grade or above! I don't know
How about five? Would you?
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- 1. 2 × 1 / 3 = 1 / 2 - 1 / 3, 3 × 1 / 4 = 1 / 3 - 1 / 4, 2 × 1 / 4 = 1 / 2 × (1 / 2 - 1 / 4) 1、 What do you find in it? 2、 Use your findings to work out the following two questions （1）1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90 （2）1/1×4+1/4×7+1/7×10+1/10×13+1/13×16
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