Elementary equations, no less than two steps, 50 ways 10

Haha, think for yourself, I won't tell you.

1 100 2 1 = 51 (tree) 51 3 1 = 17 (tree) 17 2 = 34 (tree).

At the beginning, divide it by two to calculate the interval, and add the first tree, which means that a total of 51 trees should be planted on one side, and there are two cedar trees and one willow tree in every three. Divide 51 by 3 to get how many groups there are, and then multiply by how many trees there are in each group, that is, multiply by 1, and get 17 trees on one side, because there are both sides, so multiply by 2 to get 34 trees.

2 It should be three. Because there are only 5 numbers greater than 4 and less than 20, divisible by 1303 Oil weight = (kg Barrel weight = 8-7 = 1 kg.

4 is subtracted from the single digit 6 written as 9 9-6=3 will get the result of 3 more subtraction tens of the 9 than the original 9 will get the result less than the original then, the original +

The original number was.

That's all I know at the moment, hope.

These questions are all good, but why do you save so many keywords? The question doesn't make sense. I'll barely answer a few questions.

3. A barrel of oil weighs 8 kilograms, and half of the oil weighs kilograms, so how many kilograms are there?

How many kilograms of oil are there? Because it is poured out half a barrel of oil, kilograms) is the weight of half a barrel of oil, so it can be known that the weight of a barrel of oil is kilograms). Then the oil drum is 1 kg.

4. When doing a subtraction problem, the careless Xiaoqiang mistakenly wrote the 6 in the subtracted digit as 9, and the 9 in the subtraction decile as 6, and the final difference was what the correct answer to this question should be?

Solution: The 6 in the subtracted digit is miswritten as 9, and the difference is increased by 3, and the 9 in the subtracted decile is mistakenly written as 6, the difference is increased by 30, and the final difference is increased by 33, so the final answer should be.

5 The equation holds with four arithmetic symbols and parentheses.

1）（ x2) x + x +

6. There is a wire, the first time it is used to take more than 1 meter of its length, and the second time it is used to remove the remaining half, and finally the length of the remaining is meters. How many meters is this wire long?

The last remaining length is meters, and before the second use, it is 5 meters, and 5+1=6 is half of the original length, so the original length is 6x2=12 (m).

7 Uncle Zhang has some chickens and rabbits at home, there are 12 heads in total, 30 are called (feet), and he asked how many chickens and rabbits there are?

Assuming that there are 6 chickens and 6 rabbits, then there are 36 legs, and each rabbit lost 2 legs, so the rabbits should be 3 and the chickens 9.

8 There are a group of tourists on board. If 10 people are made per boat, there are 4 people left; If each boat seats 12 people, there is 1 boat left. Q: How many boats, how many people?

Each boat has 12-10 = 2 more (people), 10 people on a boat plus 4 people left, it should be exactly a group of 2 people to every 12 people on the boat, then the boat has (10+4) 2=7 (only) 7+1=8 (only) people have 7x12=84 (people), so there are 8 boats, 84 people.

9 A sheep and two cows eat a total of 48 kg of grass a day, and one sheep and five cows eat 108 kg of grass a day. How many kilograms do each sheep and each cow eat in a day?

Because a sheep and two cows eat a total of 48 kg of grass a day, and one sheep and five cows eat 108 kg of grass a day. So 108-48 = 60 (kg) is the grass eaten by 3 cows in a day, 60 3 = 20 (kg) is the grass eaten by a cow in a day, then the grass eaten by a sheep is 48-20x2 = 8 (kg).

2*5*13 so there are *13 four.

3. Ask how many kilograms there are.

barrel (oil 8-1 7

5 The equation holds with four arithmetic symbols and parentheses.

7. (12*4-30) 2 9 chickens.

12-9 3 Rabbits.

8, (4+12) (12-10) 8 boats.

8*10+4 84 people.

9. (108-48) (5-2) 20 Eat 20 kg per cow a day.

48-20*2 8 Eat 8 kg per sheep a day?

8 5 16 3 unknowns

3 10 unknowns

Unknowns Unknowns.

Unknowns