Math summer homework for the fifth grade of primary school (if you can arrange it) (let's talk about the process)

1 was cut into three sections, and then four sections were added, so the area of each section was 36/4=9 and the side length was 3.

So the cuboid volume is 3*3*50=450 cubic centimeters.

2 The side length of the cube surrounded by steel wires is [(20+16+12) * 4]/12 =16cm.

So the surface area of the cube is16 *16 * 6 =1536cm2.

3 is similar to 1, and its cross-sectional area is125/[(6-1) * 2] =12.5cm.

So the volume is 12.5*35=437.5 cubic centimeters.

4 24 = 1 * 2 * 2 * 3, and the simplest score is 1/24 3/8 8/3.

5 25-(20*4- 18*4)= 17

The common divisor of 6, 42 and 30 is 2, 3 and 6, so at most 6 groups are given, and each group is given 7 or 5 bottles of two kinds of drinks.

7 A+B+C = 33 B+C = 18 A+C = 20 A = 15 B = 13 C = 5

8 Take two bags in pairs, and the two bags that are not tilted by the scale are 500g, and then take the ratio of one of these two bags to the third bag that is not 50g. If the scale is biased towards 500g, the other bag is lighter than 500g, and vice versa.

9 189/9=2 1

10 didn't say how many days it took, and the question couldn't be answered.

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