Mom has to bake 20 cakes, only 3 bacakes at a time, and both sides must be baked

3 sheets: 2 noodles * 2 minutes = 4 minutes (one time).

20 cakes 3 pieces of cakes = 6 times of 3 pieces of pies + 1 time of 2 sheets, because each side is baked at the same time, so the time of 2 pieces of cakes and 3 pieces of cakes is only in the time of turning over, as the question can be ignored, so it can be regarded as 7 times 3 sheets.

4 minutes at a time * 7 times = 28 minutes.

The answer is wrong.

No matter how you arrange the position, what side A and side B are, the final result is 20 cakes, 40 sides, 2 minutes on each side, that is, a total of 80 minutes of baking.

And it can be burned 3 sheets per minute.

So the minimum time is 80 3

Rounding is 27 minutes

The answer is as follows: the first 15 sheets, you can calculate 3 sheets at a time, one front and back, 4 minutes.

That is, the first 15 cards take 5 * 4 = 20 minutes.

The last five. In the first minute, 1 positive 2 positive 3 positive.

The second minute, 2 positive, 3 positive, 4 positive (2, 3 positive heads), the third minute, 4 positive, 5 positive, 1 positive (1, 4 positive, good), the fourth minute, 5 positive, 2 negative, 3 anti (5 positive, good), the fifth minute, 2 anti, 3 anti, 4 anti (2, 3 tails), the sixth minute, 4 anti, 5 anti, 1 anti (4 tails), 7th minute, 5 anti, 1 anti (completed).

20 sheets is 40 sides 3 sides each time = 40 3

13 times to add one side without burning.

It's very simple, you can bake 39 dough cakes in 26 minutes, and you can have one more side, and this side will be baked separately at this time, so add 2 minutes, and the answer is 28 minutes.

28 minutes 3 pieces of bread at a time, 2 minutes on each side, 4 minutes on both sides;

20 loaves 3 loaves = 6 and 2, two loaves take the same amount of time as three loaves, so a total of 7 times are needed.

7 times * 4 minutes = 28 minutes.

3=, take an integer, a total of 7 times need to be burned;

2*2=28 minutes.

20 3 = 6 + 2 3 i.e. 7 times.

2*2=4 minutes (time on both sides each time).

Only 2 cakes can be baked at a time, both sides must be baked, each side should be baked for 4 minutes, and 5 cakes should be baked in 20 minutes at the earliest.

Calculated according to the title:

For 5 pancakes, fry 2 pancakes first, and the time is 4 2 = 8 minutes.

The remaining 3 sheets are fried alternately, set up as A, B, and C, the first 4 minutes to fry the front side of A and B, the middle 4 minutes to fry the reverse side of A and the front side of C, and the last 4 minutes to fry the reverse side of B and C, 4 3 = 12 minutes and it is baked.

So share 8 + 12 = 20 (minutes).

Therefore, if you want to bake 5 cakes, you can finish it in 20 minutes at the earliest.

To bake three cakes, you need:

4+4+4=12 minutes.

The method is: first two sheets on one side, then take out one, change to another, and then one side; The last two are branded on one side and the other on the other).

The remaining two cards take: 4+4=8 minutes.

Minimum total required: 12 + 8 = 20 minutes.

When using the "truncation method" in addition or subtraction, add or subtract directly from the left high position (while paying attention to whether the next digit needs to be carried or misplaced) until you get the answer that the option requires precision. When using the "truncation method" in multiplication or division, in order to make the results as accurate as possible, it is necessary to pay attention to the direction of the interception approximation:

1. To expand (or shrink) one multiplier factor, it is necessary to shrink (or expand) another multiplier factor;

2. To expand (or shrink) the dividend, it is necessary to expand (or shrink) the divisor. If you are looking for the sum or difference of the product of two times (i.e., a*b+ -c*d), you should pay attention to:

3. If one side of the plus sign is enlarged (or reduced), the other side of the plus sign shall be reduced (or expanded);

4. Enlarge (or reduce) one side of the minus sign, then enlarge (or reduce) the other side of the minus sign.

You can calculate that two cakes should be baked on both sides, four minutes on each side, eight minutes for one cake, 16 minutes for two cakes at a time, and an hour for five cakes at the earliest.

There are really not many people who can make cakes, you are really a skilled craftsman, then you can cook it slowly!

As fast as 20 minutes, you see if I say your answer is correct.

I'll have to take 25 minutes, I don't know if it's right, you have the answer.

30 minutes to strike the clock. 10 pieces of cakes, a total of noodles = 10 2 = 20 noodles. You can bake both sides at a time, so the number of times = 20 2 = 10 times. Each time is 3 minutes, so a total of = 3 10 = 30 minutes.

Bake 11 cakes, each time you can open your eyes to bake 3 cakes, both sides have to talk about baking, each side of the bake 1 minute, it takes 36 minutes. According to the query of relevant information, this is a primary school math problem, two cakes are baked together, to be branded 6 times, once a 3-point chain to touch the bell, both sides have to be burned, and the time used is twice as long, so it should be 6 times 3 times and then multiplied by 2, which is 36 minutes.

Summary. Mom bakes cakes in a pan, only two at a time, on both sides, 2 minutes on each side, and at least 8 minutes to cook 3 cakes

Mom bakes cakes in a frying pan, only two at a time, both sides must be baked, it takes 2 minutes on each side, and it takes at least a minute to cook 3 cakes

Mom bakes cakes in a pan, only two at a time, on both sides, 2 minutes on each side, and at least 8 minutes to cook 3 cakes

Get two at first.

Pros and cons for 4 minutes.

Then get another one.

Pros and cons for 4 minutes.

It's eight minutes in total.

Summary. Put 10 sheets first, wait for 5 minutes, take out 5 sheets from the pot that are seared on one side, then put in 5 sheets that are not baked, and after another 5 minutes, take out the ones that are baked on both sides of the pot, and then put the 5 sheets that you started to take out into the pot, and take them all out after 5 minutes.

Aunt Zhang's pot can be honored as a friend to brand 10 cakes at a time, and Qinghuai should be burned on both sides, and each Hu Shen noodles will be burned for 5 minutes. Now the customer wants to buy 15 cakes and asks Aunt Zhang to cook them within 15 minutes.

Hello, please wait.

To help you out, you can do this.

Put 10 sheets first, crack the forest and wait for 5 minutes after the annihilation, take out the lack of source from the pot and punch 5 sheets that have been branded, and then put in 5 sheets that are not burned, and after another 5 minutes, take out the pot that is burned on both sides, and then put the 5 sheets that you start to take out into the pot, and take them all out after 5 minutes.

Don't you need to count the columns?

No, you can just do it.

150 minutes. Baking 100 cakes at the same time, feasting on a cake refers to 3 minutes, one should be baked on both sides, 100 cakes need (100 2) 3=150 minutes, and 100 cakes need 150 minutes. Cook two cakes in one pan, but the area of the cakes should not be too large, otherwise they will stick together. Only the cover.