When Xiaoli calculates an addition problem, she calculates adding 20 to subtracting 20, and the resu

He calculated adding 20 and subtracting 20 to get it, and 49 proves that it is obtained after adding and subtracting 20, 49 At this time, we only need to use 49+20 to get the original addition, and then add the original correct 20 to get the correct number.

Suppose this equation looks like this: x+20= The result is x-20=49 because of carelessness, so that we can do 49+20 backwards to equal x.

Xiaoli, when calculating an addition problem, adding 20 is calculated as subtracting 20, and the result is 49 What is the correct number? Well, then assuming that the correct number is x, then Xiaoli is in the calculation, adding 20 to subtracting 20, that is, use 49 + 20, and add 20 = 89

Adding 20 is calculated as subtracting 20, and the result is 49, and the correct number is:

In this question, adding 20 is calculated as subtracting 20 to get 49, which is actually two less 20s, and the correct result is.

Adding 20 is minus 20, which means 40 is missing, so the correct number is 49 + 40 = 89.

Add 20 to minus 20, subtract 20 + 20 = 40

The correct result is: 49+40=89

If the result is 49 after subtraction, it means that the other addition is 49+20=69, then the correct result is 69+20=89

When Xiaoli calculates an addition problem, she calculates adding 20 to subtracting 20. The result is equal to 49. In fact, this number should be 20 + 49 = 69, then the correct calculation result is.

The correct number is 89. It is also possible to:

That is, the original number -20 = 49, that is, the original number is 69, so it should be 69 + 20 = 89, and the correct value should be 89

From the question x 20 = 49, calculate x and add 20 to get 89

The correct result for this question should be 89, 49 + 2 20 is correct.

Calculate 49 + 20 = 69 first

Then calculate 69 + 20 = 69

Therefore, the correct number is 69

Adding 20 counts as subtracting 20, and it should be correct to add 40.

Answer: The correct number is 89

The original addition should be:

49 + 20 = 69, plus 20 should be: 69 + 20 = 89

The correct number is 89.

According to the title, the wrong formula is (

The correct one is 69 + 20 = 89

Let this unknown be x, get.

x minus 20 equals 49

Solution x 69

So 69 plus 20 89

The correct number according to the question is:

Xiaoli is calculating the subtraction problem, taking the subtraction 12 as 21, and the result of this calculation is 45, then the available result is 21 12=9 smaller than the correct result, so the correct result is 45+9=54.

First, the wrong is wrong, use the wrong difference 45 + the wrong minus 21 to find the correct subtraction = 45 + 21 = 66, and then use the subtraction one correct subtraction = correct difference to find the correct difference = 66-12 = 54

Answer: The correct result is 54

Subtracted -21=45, first find the subtracted number, 21+45=66

Then find the correct result, 66-12=54, that is, the correct result is 54

The subtraction of 12 is seen as 21, and the addition of 9 is the correct number. 45+9=54 The correct number is 54

Minus 45 + 21 = 66

The correct result is 66-12=54

Treat the minus 12 as 21, which means that when Xiaoli calculated, she subtracted more:

The correct result is:

Answer: The correct number is 54

The minus is 45 + 21 66

The correct result is 66-12 54

Answer: The correct result is 54.

Solution: (21-12) +45

Answer: The correct result is 54

A minus of 12 is seen as 21, which is equivalent to an increase of 9 in the minus. This means that the difference is 9 less than the original.

Therefore the correct difference is 54. The correct subtraction is 54 + 12 = 66.

Calculate the subtracted number first. Subtracted = Difference + Subtraction.

Minus 45 + 21 = 66

Correct difference = 66-12 = 54

Let the subtracted number be a, and the equation A is 21 45, A 66, then the correct number is: 66 - 12 54, that is, the single digit and the ten digits are interchanged.

This is the number 45 + 21-12 = 66 - 12 = 54.

Consider the minus 12 as 21, and subtract more.

Add back what is more and more and you will get the right result.

The correct result is.

Summary. Counting +25 to -25 results in 49, and the correct result should be 99. Because a number -25 = 49, we can get this number 49 + 25 = 74, and the sum of this number and 25 is 74 + 25 = 99.

It can also be understood that the original number should be added to 25, which is actually calculated as minus 25, that is, the original number is reduced by two 25, so the original number is 49 + 25 + 25 = 74 + 25 = 99. The correct result is 99.

When Xiao Ming calculates an addition, add 25 and write it as minus 25, and the result is 49, then the correct result should be several, hello! We're happy to answer for you! The correct result is: 99

Counting +25 to -25 results in 49, and the correct result should be 99. Because a number -25 = 49, we can get this number 49 + 25 = 74, and the sum of this number and 25 is 74 + 25 = 99. The loss is not boring, so it is understood that the original number should be added to 25, which is actually calculated as minus 25, that is, the original number is reduced by two 25, so the original number is 49 + 25 + 25 = 74 + 25 = 99.

The correct result is 99.

Summary. Xiaoli subtracted 20 from a number and miscalculated it as adding 20, and the result was 50, what is the correct result?

The correct result is 10

Summary. Hello dear Xiaoli subtracted 20 from a number, miscalculated as adding 20, the result is 50, the correct result is 10 calculation method 50-20 3030-20 10 I hope mine is helpful to you.

Xiaoli subtracted 20 from a number and miscalculated it as adding 20, and the result was 50, what is the correct result?

You imitate Lahao Qin Xiaoli subtracted 20 from a number, and miscalculated it as 20 on the top of Hu Gao, the result is 50, and the correct result is 10 Calculation method 50-20 3030-20 10 I hope that I will be helpful to you.

**If you don't understand, feel free to contact me.

When Yiyi does a subtraction problem, he considers subtracting 17 as adding 17, and the result is 61, and the correct number is how many.

When Yiyi does a subtraction problem, he considers subtracting 17 as adding 17, and the result is 61, and the correct number is how many.

Hello, when I do a subtraction problem, I see subtracting 17 as adding 17, and the result is 61, and the correct number is 61, and the analysis is 61 + 17 7878-17 Slippery Spring 61, I hope mine is helpful to you.

According to the question, it can be known that the other addition does not change, so according to the wrong operation, there is an addition of -29=11, and an addition of =11+29=40.

So the correct answer is 40 + 27 = 67.

The subtracted number is equal to 29 + 11 = 40

The subtraction is the original addition, so the correct result is 40 + 27 = 67

When Xiaoli calculates a subtraction problem, she sees the subtraction of 13 as 31, and the marriage calculated in this way is 49. What is the correct result?

It can be estimated that the subtracted number should be 49+31=80, then the original question should be 80-13, and the correct result is 67

Summary. Answer 80, the correct result is 80, the calculation process: 20 + 40 = 60, 60 + 20 = 80, so the correct result is 80, calculate <> with addition

Xiaoli saw adding 20 as subtracting 40 when doing the question, and the result was 20, what should be the correct answer?

Answer 80, the correct result is 80, the calculation process: 20 + 40 = 60, 60 + 20 = 80, so the correct result is 80, and the <> is calculated with the addition calendar

To make the meaning clearer, the answer is 80, the correct result is 80, calculated the distance of the pickpocketing brigade: 20 + 40 = 60, 60 + 20 = 80, the correct result is 80, calculated by addition, 20 + 40 = 60, another town is 60, then 60 + 20 = 80, the correct result is 80

40=20, then ()=20+60, ()60

Explain that the other addition is 60, then 60 + 20 = 80

Originally, it was calculated that 60 plus 20, 60 + 20 = 80

Think about it, which number minus 40 is equal to 20, the subtracted number = minus number + difference, 20 + 40 = 60, the subtracted number is 60

And 60 is the addition number, which is taken as a subtracted number, and then 60 + 20 = 80, and the correct result is 80