Zhang Xiu completed sixty arithmetic problems in three minutes, and all of them were correct, what i

Completing 60 oral arithmetic problems in a minute should be very powerful, and if he gets all of them right, it will be even more powerful. Under normal circumstances, it should be 89% accurate.

If you do all the exercises in three minutes and get them right, then he should be 100% correct. Don't calculate.

Of all of my total, he got it 100% right, which is a good result.

Hello, if you complete the math problem and get it all right, then it is 100% correct. It is the correct number divided by the total number of questions.

If he gets all the questions right, he can say that he gets it 100% right.

I'm glad to make you have a different way of doing the math and adding new ones.

Zhan Xiu completed 60 mouth arithmetic problems in three minutes, and all of them were correct, he didn't know what his correct rate was, but its complete rate was 100%.

Zhang Xiu completed 60 arithmetic problems in three minutes, and all of them were correct, and its accuracy rate was. The rate is 100 percent.

Zhang Xiu's three minutes, his completion of his 64 arithmetic problems, we can all of it correct, his accuracy rate should be 100%.

Zhang Xiu completed 60 arithmetic problems in three minutes, and all of them were correct, and his correct rate was 100%.

Accuracy refers to the degree of correctness of the expression or description of a thing, which is used to reflect the correct answer to the thing.

He completed 60 oral arithmetic problems in 3 minutes, and all of them were correct, and his calculation rate was 100%.

Zhang Xiu, last time he completed 60 mouth arithmetic problems, and all of them were correct, his correct rate was 100%.

Xiaohong did 48 mouth arithmetic problems in 3 minutes, and did 6 wrong questions, with a correct rate of 42 48 = 70%.

Xiao Ming did 70 oral arithmetic problems in 5 minutes, and did 60 correctly, with a correct rate of 60 70=

Xiao Ming's accuracy rate is high.

(42/3)/(48/3)=

60 5) (70 5) is approximately equal to.

Xiao Ming has a high accuracy rate.

1. Xiaohong does 48 3=16 questions in 1 minute on average, and makes mistakes in 1 minute on average: 6 3=2 questions, and Xiaohong's correct rate is: (16-2) 16=

2. Xiao Ming does the average 1 minute: 70 50 = 12 questions, the average 1 minute does the wrong question: (70-60) 5 = 2 questions, Xiao Ming's correct rate is: (12-2) 12

Answer: Xiaohong has a high accuracy rate.

60 divided by 3 = 20 (way) (find the mark key to do the problem in one minute) 160 to 20 = 8 (points).

5 times 20 = 100 (Dao) Chazhouhu.

Answer: It takes 8 minutes to complete 160 questions, and 100 oral calculations can be completed in 5 minutes.

The correct rate is right divided by the total number multiplied by 100% = 50 60 * 100% =

The error rate is 1 - correct rate =

Solution: The correct rate is.

50/60x%=

The error rate is . 60-50）/60x100%=

From the question, it can be seen that 50 of the 60 questions are correct, 50 60 = 5 6 =

Correctness = (Total number of corrects) x 100%.

Xiaolan: [(40-4) 40]x100%=90%Xiaofang: (45 50)x100%=90%.

Both of them have the same high accuracy rate!

60x8=480

Xiaoxiao does 60 oral arithmetic problems every day, and it can do a total of 480 oral arithmetic problems in eight days.

60 8 = 480 (channel).

A total of 480 arithmetic problems can be done in eight days.

In the afternoon, the oral arithmetic speed is 160 8 = 20 questions in minutes.

Therefore, 200 questions = 200 20 = 10 minutes.

Xiaohong completed 80 oral arithmetic questions in 5 minutes in the morning and 160 oral arithmetic questions in 8 minutes in the afternoon. According to the calculation of the ratio of the number of oral arithmetic questions to the time in the afternoon, how much time does it take to complete the 200 oral arithmetic?

Solution: Directly ignore the morning, complete 160 in 8 minutes in the afternoon, and set the time x, then you can get the following equation:

8:160=x:200

Calculate that x is 10 minutes.

Aren't these multiplication formulas mandatory for elementary school students to memorize?